BE338172A - - Google Patents

Info

Publication number: BE338172A
Authority: BE; Belgium

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.)

1925-11-16

Publication of BE338172A publication Critical patent/BE338172A/xx

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/04—Plane diaphragms
- H04R7/06—Plane diaphragms comprising a plurality of sections or layers
- H04R7/08—Plane diaphragms comprising a plurality of sections or layers comprising superposed layers separated by air or other fluid

Landscapes

Engineering & Computer Science (AREA)
Multimedia (AREA)
Physics & Mathematics (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)

BE338172D 1925-11-16 BE338172A (cg-RX-API-DMAC10.html)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
FR618595T		1925-11-16

Publications (1)

Publication Number	Publication Date
BE338172A true BE338172A (cg-RX-API-DMAC10.html)

Family

ID=8983089

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE338172D BE338172A (cg-RX-API-DMAC10.html)	1925-11-16

Country Status (2)

Country	Link
BE (1)	BE338172A (cg-RX-API-DMAC10.html)
FR (1)	FR618595A (cg-RX-API-DMAC10.html)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS5330296A (en) *	1976-09-01	1978-03-22	Seiko Instr & Electronics Ltd	Electro-acoustic transducer
JPS60134700A (ja) *	1983-12-23	1985-07-17	Nippon Denso Co Ltd	発音装置

0
- BE BE338172D patent/BE338172A/xx unknown
1925
- 1925-11-16 FR FR618595D patent/FR618595A/fr not_active Expired

Also Published As

Publication number	Publication date
FR618595A (fr)	1927-03-11

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