CN104078731B - Cavity filter - Google Patents
Cavity filter Download PDFInfo
- Publication number
- CN104078731B CN104078731B CN201310109952.2A CN201310109952A CN104078731B CN 104078731 B CN104078731 B CN 104078731B CN 201310109952 A CN201310109952 A CN 201310109952A CN 104078731 B CN104078731 B CN 104078731B
- Authority
- CN
- China
- Prior art keywords
- circuit plate
- ground floor
- cavity filter
- coupling
- resonant column
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000008878 coupling Effects 0.000 claims abstract description 79
- 238000010168 coupling process Methods 0.000 claims abstract description 79
- 238000005859 coupling reaction Methods 0.000 claims abstract description 79
- 230000005611 electricity Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
A kind of cavity filter, including ground floor earthed circuit plate, intermediate layer circuit board and second layer earthed circuit plate.Described ground floor earthed circuit plate is provided with multiple resonant column, and described intermediate layer circuit board is provided with accepting groove, and described second layer earthed circuit plate is provided with and described resonant column resonator one to one.Described intermediate layer circuit board is located on described ground floor earthed circuit plate, and described resonant column is each passed through described accepting groove, and described second layer earthed circuit plate is located on the circuit board of described intermediate layer.Described resonant column is respectively protruding into described resonator and forms multiple resonant element, realizes coupling by the accepting groove of described intermediate layer circuit board between described resonant element.The cavity filter that the present invention provides is lightweight, ease of assembly, can effectively reduce the cost of product.
Description
Technical field
The present invention relates to base station filters, particularly relate to a kind of cavity filter.
Background technology
Cavity filter is one of assembly common in GSM.Traditional base station cavity filter is usual
Including cover plate and multiple cavity.Each cavity is provided with multiple resonatron.The function of each cavity is equivalent to one
Individual resonator, when wave filter is tuned to the suitable wavelength of received signal, the resonance that institute's resonator is formed
Circuit is represented by including the parallel oscillatory circuit of inductance part and capacitive part, by adjusting inductance part or electricity
Hold part, the resonant frequency of wave filter can be adjusted.
The cavity of traditional base station cavity filter and cover plate generally use the production technology of die casting (Die-Casting)
Make.Use the cavity that extrusion process produces, bulky, Heavy Weight, it is unfavorable for the assembling of product and removes
Fortune.Meanwhile, extrusion process need to be equipped with special main equipment, develop special mould, thus improves product
Cost.
Summary of the invention
In view of this, a kind of lightweight, low cost need to be provided, and hold easy-to-assemble cavity filter.
The cavity filter that the embodiment of the invention provides includes ground floor earthed circuit plate, intermediate layer electricity
Road plate and second layer earthed circuit plate.Described ground floor earthed circuit plate is provided with multiple resonant column, described centre
Layer circuit board is provided with accepting groove, and described second layer earthed circuit plate is provided with and described resonant column resonance one to one
Chamber.Described intermediate layer circuit board is located on described ground floor earthed circuit plate, and described resonant column is each passed through institute
Stating accepting groove, described second layer earthed circuit plate is located on the circuit board of described intermediate layer.Described resonant column is respectively
Stretch into described resonator and form multiple resonant element, between described resonant element by described intermediate layer circuit board it
Accepting groove realizes coupling.
Preferably, described cavity filter includes that coupling piece, described coupling piece include body and be located at the two of body
End a pair free end, described coupling piece be fixed on described ground floor earthed circuit plate and be located at two resonant columns it
Between.
Preferably, each free end of described coupling piece from described body towards the receipts of described intermediate layer circuit board
Tank direction extends, and described body is fixed on described ground floor earthed circuit plate by nonconducting material, described
The coupling of band line is formed respectively between free end and adjacent resonant column.
Preferably, each free end of described coupling piece from described body towards described ground floor earthed circuit plate
Direction extend and with described ground floor earthed circuit plate be electrically connected with, described free end and adjacent resonant column it
Between formed return circuit coupling.
Preferably, described cavity filter includes input and output, and described input is by input coupling piece
Realizing being of coupled connections with described resonant column, described output realizes coupling with described resonant column by output coupling piece.
Preferably, each resonant column is provided with the first tapped through hole, and described ground floor earthed circuit plate is provided with and institute
Stating resonant column and position hole one to one, described resonant column is respectively positioned in hole, described location, and debugging screw is from institute
The bottom stating ground floor earthed circuit plate positions hole accordingly through described ground floor earthed circuit plate and stretches into corresponding
Resonant column the first tapped through hole with regulate described cavity filter resonant frequency.
Preferably, between adjacent two resonant column of described ground floor earthed circuit plate, it is provided with the second tapped through hole,
The nut of coupling screws is fixed on the bottom of described ground floor earthed circuit plate, and described coupling screws passes described spiral shell
Mother also stretches into described second tapped through hole to regulate the coupling frequency of described cavity filter.
The cavity filter that the present invention provides by three layer circuit boards and is located at the resonant column on ground floor circuit board and sets
Resonator on second layer circuit board assembles and is formed, and described cavity filter has lightweight, ease of assembly,
Can effectively reduce the cost of product.
Accompanying drawing explanation
Fig. 1 is the three-dimensional assembly diagram of the cavity filter of the embodiment of the invention.
Fig. 2 is the bottom schematic view of the cavity filter of Fig. 1.
Fig. 3 is the exploded perspective view of the cavity filter of Fig. 1.
Fig. 4 is the schematic diagram that in Fig. 3, intermediate layer circuit board group installs on ground floor earthed circuit plate.
Fig. 5 is the generalized section in Fig. 1 along V-V direction.
Fig. 6 be Fig. 1 cavity filter in the view of band line coupling, wherein, the total length of coupling piece
Less than λ/2.
Fig. 7 be Fig. 1 cavity filter in the view of band line coupling, wherein, the total length of coupling piece
More than λ/2.
Fig. 8 be Fig. 1 cavity filter in the view of return circuit coupling, wherein the total length of coupling piece is little
In λ/2.
Fig. 9 be Fig. 1 cavity filter in the view of return circuit coupling, wherein the total length of coupling piece is big
In λ/2.
Main element symbol description
Cavity filter 100
Ground floor earthed circuit plate 10
Intermediate layer circuit board 20
Accepting groove 21
Second layer earthed circuit plate 30
Resonator 31
Resonant column 40
First tapped through hole 41
Coupling piece 50
Body 51
Free end 52
Input 60
Input coupling line 61
Output 70
Output coupling line 71
Debugging screw 80
Coupling screws 90
Nut 91
Resonant element 200
Following detailed description of the invention will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Detailed description of the invention
Referring to Fig. 1, Fig. 2 and Fig. 3, the cavity filter 100 provided in the embodiment of the invention
Including ground floor earthed circuit plate 10, intermediate layer circuit board 20 and second layer earthed circuit plate 30.Ground floor connects
Ground circuit board 10 is provided with multiple resonant column 40, and intermediate layer circuit board 20 is provided with accepting groove 21, second layer ground connection
Circuit board 30 is provided with resonant column 40 resonator 31 one to one with ground floor earthed circuit plate 10.Intermediate layer
Circuit board 20 is located on ground floor earthed circuit plate 10, and resonant column 40 is each passed through accepting groove 21, the second layer
Earthed circuit plate 30 is located on intermediate layer circuit board 20, the resonant column of ground floor earthed circuit plate 10 40 points
The resonator 31 not stretching into second layer earthed circuit plate 30 is interior to form multiple resonant elements 200.Described resonance list
Coupling is realized by the accepting groove 21 of intermediate layer circuit board 20 between unit 200.
The cavity filter 100 that the present invention provides by three layer circuit boards and is located on ground floor earthed circuit plate 10
Resonant column 40 and the resonator 31 being located on second layer earthed circuit plate 30 assemble and are formed, described cavity filter
100 have lightweight, ease of assembly, can effectively reduce the cost of product.
Referring to Fig. 2, Fig. 3 and Fig. 5, ground floor earthed circuit plate 10 is provided with multiple and resonant column 40 1
The hole, location 11 of one correspondence, each resonant column 40 includes the first tapped through hole 41.During installation, described resonance
One end of post 40 is respectively positioned in the corresponding hole, location 11 of described ground floor earthed circuit plate 10, the other end
It is respectively protruding in the corresponding resonator 31 of second layer earthed circuit plate 30.First screw thread of described resonant column 40
Through hole 41 hole, location 11 with ground floor earthed circuit plate 10 respectively communicates.Debugging screw 80 is from described first
The bottom of layer earthed circuit plate 10 is through corresponding the first screw thread positioning hole 11 and going deep into corresponding resonant column 40
Precession in through hole 41/screw out described first tapped through hole 41 regulates the resonant frequency of described cavity filter 100.
In present embodiment, resonant column 40 is positioned the hole, location of ground floor earthed circuit plate 10 by the way of welding
In.In other embodiments, resonant column 40 can also be by surface mount technological orientation in ground floor ground connection electricity
In the hole, location 11 of road plate 10.
In present embodiment, between each two resonant column 40 of ground floor earthed circuit plate 10, it is provided with the second screw thread
Through hole 12, the nut 91 of coupling screws 90 is fixed on the bottom corresponding of described ground floor earthed circuit plate 10
At two tapped through holes 12, coupling screws 90 is through described nut 91 and stretches into described second tapped through hole 12 and revolves
Enter/screw out described second tapped through hole 12 coupling frequency with the described cavity filter 100 of regulation, such as Fig. 2 and figure
Shown in 3.The frequency difference that cavity filter 100 is caused by processing procedure can be compensated for by fine setting coupling screws 90.
The debugging screw 80 of the cavity filter 100 of the present invention is adjusted from bottom to top from the bottom of cavity filter 100
The frequency of joint cavity filter 100, debugging screw 80, directly by the internal diameter tapping of resonant column 40, can effectively drop
The cost of low production.Meanwhile, the nut 91 of coupling screws 90 is fixed on the bottom of ground floor earthed circuit plate 10,
Can effectively shorten the distance between cavity filter 100 chamber and chamber, thus reduce the chi of cavity filter 100
Very little, reduce volume.The debugging direction of debugging screw 80 and coupling screws 90 is and regulates from bottom to top, guarantor
Hold same debugging direction, it is simple to the commissioning operation of described cavity filter 100.
Accepting groove 21 form and dimension of intermediate layer circuit board 20 can be according to the resonant column 40 of cavity filter 100
Layout on ground floor earthed circuit plate 10 sets.When second layer earthed circuit plate 30 is installed on intermediate layer electricity
Time on road plate 20, the accepting groove 21 between each two resonator 31 just forms an air duct, when cavity is filtered
When ripple device 100 normally works, between each two resonant element 200, realize coupling by described accepting groove 21, can
Effectively reduce loss.In present embodiment, the size changing accepting groove 21 changes the size of coupling amount.
As a further improvement on the present invention, cavity filter 100 includes coupling piece 50, and described coupling piece 50 is solid
Due to ground floor earthed circuit plate 10 and be located between two resonant columns 40.When intermediate layer circuit board 20 is installed on
Time on ground floor earthed circuit plate 10, described coupling piece 50 is contained in the accepting groove of described intermediate layer circuit board 20
In 21.Being provided for of coupling piece 50 makes to produce between corresponding two resonant columns 40 inductive or electric capacity coupling
Close.
In present embodiment, coupling piece 50 includes body 51 and is respectively arranged on a pair of two ends of body 51 freely
End 52.Each free end 52 of coupling piece 50 is from described body 51 receipts towards intermediate layer circuit board 20
Tank 21 direction extends, and body 51 is fixed on described ground floor earthed circuit plate 10 by nonconducting material,
The coupling of band line is formed between described free end 52 and adjacent resonant column 40.If the total length of coupling piece 50 is little
In λ/2, it is capacitive couplings (negative coupling), as shown in Figure 6.If the total length of coupling piece 50 is more than
λ/2, are inductive couplings (just coupling), as shown in Figure 7.
In other embodiments, each free end 52 of coupling piece 50 is towards ground floor earthed circuit plate 10
Direction extend and be electrically connected with ground floor earthed circuit plate 10.Now, the free end 52 of coupling piece 50 with
Return circuit coupling is formed to strengthen coupling between adjacent resonant column 40.If the total length of coupling piece 50 is little
In λ/2, it is inductive couplings (just coupling), as shown in Figure 8.If the total length of coupling piece 50 is more than
λ/2, are capacitive couplings (negative coupling), as shown in Figure 9.
The visual cavity filter of size 100 of the quantity of coupling piece 50, position and size actual frequency need
Ask and arrange.
The cavity filter 100 that the present invention provides includes the input 60 being located on ground floor earthed circuit plate 10
And output 70.Described input 60 realizes input by input coupling line 61 with resonant column 40 and couples, output
End 70 realizes output by output coupling line 71 with resonant column 40 and couples.
In sum, the cavity filter 100 of the present invention is by three layer circuit boards and by being located at ground floor earthed circuit
Resonant column 40 on plate 10 and the resonator 31 being located on second layer earthed circuit plate 30 are constituted, lightweight,
Volume is little, convenient carrying, can effectively reduce the cost.The coupling framework of described cavity filter 100 be by
Intermediate layer circuit board 20 grooving makes formation air duct between two cavitys to form coupling path, be effectively reduced
Loss.Meanwhile, the debugging screw 80 of described cavity filter 100 and coupling screws 90 are all from cavity filter
The bottom of 100 regulates from bottom to top, not only can reduce the size of cavity filter 100, it is also possible to significantly facilitate
Debugging operations.
Claims (6)
1. a cavity filter, including ground floor earthed circuit plate, intermediate layer circuit board and second layer ground connection electricity
Road plate, described ground floor earthed circuit plate is provided with multiple resonant column, and described intermediate layer circuit board is provided with accepting groove,
Described second layer earthed circuit plate is provided with and described resonant column resonator one to one, described intermediate layer circuit board
Being located on described ground floor earthed circuit plate, described resonant column is each passed through described accepting groove, the described second layer
Earthed circuit plate is located on the circuit board of described intermediate layer, and described resonant column is respectively protruding into described resonator and is formed many
Individual resonant element, realizes coupling by the accepting groove of described intermediate layer circuit board between described resonant element；
Each resonant column is provided with the first tapped through hole, and described ground floor earthed circuit plate is provided with and described resonant column
Positioning hole one to one, described resonant column is respectively positioned in hole, described location, and debugging screw is from described ground floor
The bottom of earthed circuit plate positions hole accordingly through described ground floor earthed circuit plate and stretches into corresponding resonant column
The first tapped through hole with regulate described cavity filter resonant frequency.
2. cavity filter as claimed in claim 1, it is characterised in that described cavity filter includes coupling
Sheet, described coupling piece includes body and is located at a pair free end at two ends of body, and described coupling piece is fixed on institute
State ground floor earthed circuit plate and be located between two resonant columns.
3. cavity filter as claimed in claim 2, it is characterised in that each of described coupling piece is freely
End extends towards the accepting groove direction of described intermediate layer circuit board from described body, and described body is by nonconducting
Material is fixed on described ground floor earthed circuit plate, forms band between described free end and adjacent resonant column respectively
Line couples.
4. cavity filter as claimed in claim 2, it is characterised in that each of described coupling piece is freely
End from described body towards the direction of described ground floor earthed circuit plate extend and with described ground floor earthed circuit plate
It is electrically connected with, between described free end and adjacent resonant column, forms return circuit coupling.
5. cavity filter as claimed in claim 1, it is characterised in that described cavity filter includes input
End and output, described input realizes being of coupled connections by input coupling piece and described resonant column, described output
Hold and realize coupling with described resonant column by output coupling piece.
6. cavity filter as claimed in claim 1, it is characterised in that described ground floor earthed circuit plate it
Being provided with the second tapped through hole between two adjacent resonant columns, the nut of coupling screws is fixed on described ground floor and connects
The bottom of ground circuit board, described coupling screws is through described nut and stretches into described second tapped through hole to regulate institute
State the coupling frequency of cavity filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310109952.2A CN104078731B (en) | 2013-03-29 | 2013-03-29 | Cavity filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310109952.2A CN104078731B (en) | 2013-03-29 | 2013-03-29 | Cavity filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104078731A CN104078731A (en) | 2014-10-01 |
| CN104078731B true CN104078731B (en) | 2016-09-07 |
Family
ID=51599861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310109952.2A Expired - Fee Related CN104078731B (en) | 2013-03-29 | 2013-03-29 | Cavity filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104078731B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108123194A (en) * | 2016-11-30 | 2018-06-05 | 凯镭思通讯设备（上海）有限公司 | A kind of thin-walled stretches cavity body filter and production method |
| CN107359394B (en) * | 2017-08-15 | 2020-09-11 | 罗森伯格技术有限公司 | Adjustable electromagnetic hybrid coupling filter |
| CN110867634B (en) * | 2018-08-28 | 2022-06-24 | 罗森伯格技术有限公司 | Electromagnetic hybrid coupling filter |
| WO2021081769A1 (en) * | 2019-10-29 | 2021-05-06 | 华为技术有限公司 | Cavity filter and electromagnetic wave device |
| CN114024112B (en) * | 2021-12-08 | 2022-12-30 | 江苏贝孚德通讯科技股份有限公司 | Direct-discharge cavity capacitive coupling structure and coupling method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9305450D0 (en) * | 1993-03-17 | 1993-05-05 | Marconi Gec Ltd | Electrical band stop filter |
| CN1231526A (en) * | 1998-04-06 | 1999-10-13 | 阿尔卑斯电气株式会社 | Dielectric resonator and the dielectric filter using same |
| US7777598B2 (en) * | 2008-04-14 | 2010-08-17 | Radio Frequency Systems, Inc. | Dielectric combine cavity filter having ceramic resonator rods suspended by polymer wedge mounting structures |
| CN102025012A (en) * | 2010-12-08 | 2011-04-20 | 深圳市华思科技股份有限公司 | Multi-frequency combiner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9083071B2 (en) * | 2011-01-04 | 2015-07-14 | Alcatel Lucent | Microwave and millimeter-wave compact tunable cavity filter |
-
2013
- 2013-03-29 CN CN201310109952.2A patent/CN104078731B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9305450D0 (en) * | 1993-03-17 | 1993-05-05 | Marconi Gec Ltd | Electrical band stop filter |
| CN1231526A (en) * | 1998-04-06 | 1999-10-13 | 阿尔卑斯电气株式会社 | Dielectric resonator and the dielectric filter using same |
| US7777598B2 (en) * | 2008-04-14 | 2010-08-17 | Radio Frequency Systems, Inc. | Dielectric combine cavity filter having ceramic resonator rods suspended by polymer wedge mounting structures |
| CN102025012A (en) * | 2010-12-08 | 2011-04-20 | 深圳市华思科技股份有限公司 | Multi-frequency combiner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104078731A (en) | 2014-10-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104078731B (en) | Cavity filter | |
| TWI505541B (en) | Cavity filter | |
| CN104126247B (en) | There is the radio-frequency filter of cavity configuration | |
| CN106025465A (en) | Cavity filter | |
| KR101015041B1 (en) | Resonant cavities and methods of making such cavities | |
| CN102324602A (en) | Inductance coupling device for TE01delta mode dielectric resonator | |
| US8253509B2 (en) | Printed circuit board | |
| JP4700184B2 (en) | Integrated filter with improved I/O matching and method of manufacture thereof - Patents.com | |
| CN113113743B (en) | Single-cavity resonator and radio frequency cavity filter | |
| CN101517822B (en) | Re-entrant resonant cavities and method of manufacturing such cavities | |
| KR20210052204A (en) | Antenna | |
| CN105229847A (en) | Coupled arrangement between cavity filter resonator | |
| CN110556616B (en) | Miniaturized filter | |
| CN101800347B (en) | Cavity radio frequency device and fly bar thereof for capacitive cross coupling | |
| CN102820505A (en) | Miniaturization narrow-band filter | |
| CN101521303B (en) | Folded waveguide filter | |
| CN208173760U (en) | A kind of cavity body filter being adjustable stiffness of coupling | |
| CN104121962B (en) | A kind of adjusting method of novel water level detector and its original frequency | |
| CN102856616A (en) | Ferrite housing for microwave devices | |
| CN206532856U (en) | Suspended stripline bandstop filter and its communication cavity device | |
| CN202178356U (en) | Band-stop filter with tuning apparatus | |
| KR20130000637U (en) | Radio frequency filter with cavity structure | |
| CN202616376U (en) | Adjustable band-stop filter | |
| CN209001093U (en) | A kind of tunable filter structure based on substrate integration wave-guide | |
| CN204156063U (en) | The inductive coupled structure of a kind of dielectric filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180226 Address after: The Guangxi Zhuang Autonomous Region Nanning hi tech Zone headquarters Road No. 18, China ASEAN enterprise headquarters base three 5# workshop Patentee after: NANNING FUGUI PRECISION INDUSTRIAL CO., LTD. Address before: 518109 Guangdong city of Shenzhen province Baoan District Longhua Town Industrial Zone tabulaeformis tenth East Ring Road No. 2 two Co-patentee before: Hon Hai Precision Industry Co., Ltd. Patentee before: Hongfujin Precise Industry (Shenzhen) Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181227 Address after: Room 1, 1903, No. 3, Marriott City, 298 Yinhuan Road, Xihu District, Nanchang City, Jiangxi Province Patentee after: Jiangxi golden Xuan Enterprise Consulting Service Co., Ltd. Address before: 530007 the Guangxi Zhuang Autonomous Region Nanning hi tech Zone headquarters road 18, China ASEAN enterprise headquarters three phase 5 factory building Patentee before: NANNING FUGUI PRECISION INDUSTRIAL CO., LTD. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190430 Address after: 051130 Tianshan International Manufacturing Base, Nanbailou Village, Suyang Township, Yuanshi County, Shijiazhuang City, Hebei Province Patentee after: Shijiazhuang Dongchang Machinery Manufacturing Co., Ltd. Address before: Room 1, 1903, No. 3, Marriott City, 298 Yinhuan Road, Xihu District, Nanchang City, Jiangxi Province Patentee before: Jiangxi golden Xuan Enterprise Consulting Service Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160907 Termination date: 20200329 |