NL7502737A - Vierkanalige grammofoonplaatweergeefinrichting. - Google Patents

Vierkanalige grammofoonplaatweergeefinrichting.

Info

Publication number: NL7502737A
Authority: NL; Netherlands
Prior art keywords: square; display device; disc display; gramophone disc; gramophone
Prior art date: 1974-03-12

Application number

NL7502737A

Other languages

English (en)

Other versions

NL162812C (nl

NL162812B (nl

Original Assignee

Matsushita Electric Ind Co Ltd

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.)

1974-03-12

Filing date

1975-03-07

Publication date

1975-09-16

1974-03-12 Priority claimed from JP2870974A external-priority patent/JPS568560B2/ja

1974-03-28 Priority claimed from JP3533374A external-priority patent/JPS50128447A/ja

1974-04-10 Priority claimed from JP4126974A external-priority patent/JPS5442602B2/ja

1974-04-10 Priority claimed from JP4127074A external-priority patent/JPS569838B2/ja

1975-03-07 Application filed by Matsushita Electric Ind Co Ltd filed Critical Matsushita Electric Ind Co Ltd

1975-09-16 Publication of NL7502737A publication Critical patent/NL7502737A/nl

1980-01-15 Publication of NL162812B publication Critical patent/NL162812B/nl

1980-06-16 Application granted granted Critical

1980-06-16 Publication of NL162812C publication Critical patent/NL162812C/nl

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S3/00—Systems employing more than two channels, e.g. quadraphonic
- H04S3/006—Systems employing more than two channels, e.g. quadraphonic in which a plurality of audio signals are transformed in a combination of audio signals and modulated signals, e.g. CD-4 systems

Landscapes

Engineering & Computer Science (AREA)
Multimedia (AREA)
Physics & Mathematics (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Amplifiers (AREA)
Electronic Switches (AREA)
Networks Using Active Elements (AREA)

NL7502737.A 1974-03-12 1975-03-07 Vierkanalige weergeefinrichting voor het weergeven van grammofoonplaten. NL162812C (nl)

Applications Claiming Priority (4)

Application Number	Priority Date	Filing Date
JP2870974A JPS568560B2 (nl)	1974-03-12	1974-03-12
JP3533374A JPS50128447A (nl)	1974-03-28	1974-03-28
JP4126974A JPS5442602B2 (nl)	1974-04-10	1974-04-10
JP4127074A JPS569838B2 (nl)	1974-04-10	1974-04-10

Publications (3)

Publication Number	Publication Date
NL7502737A true NL7502737A (nl)	1975-09-16
NL162812B NL162812B (nl)	1980-01-15
NL162812C NL162812C (nl)	1980-06-16

Family

ID=27458937

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL7502737.A NL162812C (nl)	1974-03-12	1975-03-07	Vierkanalige weergeefinrichting voor het weergeven van grammofoonplaten.

Country Status (7)

Country	Link
US (1)	US4001518A (nl)
AU (1)	AU471323B2 (nl)
CA (1)	CA1007574A (nl)
DE (1)	DE2510603C3 (nl)
FR (1)	FR2264450B1 (nl)
GB (1)	GB1498065A (nl)
NL (1)	NL162812C (nl)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPH04265569A (ja) *	1991-02-19	1992-09-21	Canon Inc	音声信号記録装置及び再生装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3843850A (en) *	1970-06-26	1974-10-22	Victor Co Ltd	Four channel record reproducing apparatus with muting of speakers not used for stereo or monaural records
US3854098A (en) *	1972-01-24	1974-12-10	Victor Company Of Japan	Multichannel disc demodulation circuit
JPS5544519B2 (nl) *	1972-10-09	1980-11-12
JPS5243683B2 (nl) *	1972-12-29	1977-11-01
NL165027C (nl) *	1973-05-25		Matsushita Electric Ind Co Ltd	Vierkanalig stereofonisch weergeefstelsel.
US3894201A (en) *	1974-05-31	1975-07-08	Rca Corp	System for dynamic and static muting

1975
- 1975-03-07 NL NL7502737.A patent/NL162812C/nl not_active IP Right Cessation
- 1975-03-10 US US05/556,875 patent/US4001518A/en not_active Expired - Lifetime
- 1975-03-10 GB GB9903/75A patent/GB1498065A/en not_active Expired
- 1975-03-11 FR FR7507509A patent/FR2264450B1/fr not_active Expired
- 1975-03-11 DE DE2510603A patent/DE2510603C3/de not_active Expired
- 1975-03-12 CA CA221,960A patent/CA1007574A/en not_active Expired
- 1975-03-13 AU AU79014/75A patent/AU471323B2/en not_active Expired

Also Published As

Publication number	Publication date
FR2264450A1 (nl)	1975-10-10
AU471323B2 (en)	1976-04-15
AU7901475A (en)	1976-04-15
DE2510603A1 (de)	1975-09-25
NL162812C (nl)	1980-06-16
US4001518A (en)	1977-01-04
GB1498065A (en)	1978-01-18
FR2264450B1 (nl)	1979-03-09
NL162812B (nl)	1980-01-15
DE2510603B2 (de)	1980-01-17
CA1007574A (en)	1977-03-29
DE2510603C3 (de)	1980-09-18

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SE405650B (sv)	1978-12-18	Skivavspelningsanordning
NL7509333A (nl)	1975-10-31	Tweezijdige reproduktieinrichting.
NL7408751A (nl)	1975-12-30	Reproductie-apparaat.
NL7509215A (nl)	1976-02-04	Uitleesinrichting.
NL7513405A (nl)	1976-05-20	Weergeefinrichting.
NL7503045A (nl)	1975-09-22	Draaipotentiometer.
SE397423B (sv)	1977-10-31	Anordning foer kontroll av grammofonskivor
NL7506541A (nl)	1975-12-15	Signaalweergeefinrichting.
AT343370B (de)	1978-05-26	Aufnahme- oder wiedergabegerat
AT356926B (de)	1980-06-10	Videoplattenspieler
NL161959B (nl)	1979-10-15	Grammofoonplaat-weergeefinrichting.
NL7502737A (nl)	1975-09-16	Vierkanalige grammofoonplaatweergeefinrichting.
ATA925873A (de)	1976-07-15	Aufnahme- oder wiedergabegerat
AT342417B (de)	1978-04-10	Aufnahme- oder wiedergabegerat
ATA308174A (de)	1977-08-15	Aufnahme- oder wiedergabegerat

Legal Events

Date	Code	Title	Description
1984-11-16	V1	Lapsed because of non-payment of the annual fee