NL19874C - - Google Patents

Info

Publication number: NL19874C
Authority: NL; Netherlands

Application number

Priority date (The priority date 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 date listed.)

1925-12-22

Publication of NL19874C publication Critical patent/NL19874C/xx

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones

Landscapes

Engineering & Computer Science (AREA)
Multimedia (AREA)
Physics & Mathematics (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Diaphragms For Electromechanical Transducers (AREA)

NL19874D 1925-12-22 NL19874C (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US77033A US1763048A (en)	1925-12-22	1925-12-22	Loud-speaker

Publications (1)

Publication Number	Publication Date
NL19874C true NL19874C (en)

Family

ID=22135690

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL19874D NL19874C (en)	1925-12-22

Country Status (4)

Country	Link
US (1)	US1763048A (en)
FR (1)	FR616504A (en)
GB (1)	GB263481A (en)
NL (1)	NL19874C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US10484768B2 (en)	2017-05-23	2019-11-19	Eric James Lundgard	Speaker system

0
- NL NL19874D patent/NL19874C/xx active
1925
- 1925-12-22 US US77033A patent/US1763048A/en not_active Expired - Lifetime
1926
- 1926-04-13 GB GB9736/26A patent/GB263481A/en not_active Expired
- 1926-05-22 FR FR616504D patent/FR616504A/en not_active Expired

Also Published As

Publication number	Publication date
GB263481A (en)	1927-09-13
US1763048A (en)	1930-06-10
FR616504A (en)	1927-02-03

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