BE347740A - - Google Patents

Info

Publication number: BE347740A
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.)

1927-01-07

Publication of BE347740A publication Critical patent/BE347740A/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
- H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed

Landscapes

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

BE347740D 1927-01-07 BE347740A (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US159554A US1763054A (en)	1927-01-07	1927-01-07	Loud-speaker

Publications (1)

Publication Number	Publication Date
BE347740A true BE347740A (fr)

Family

ID=22573035

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE347740D BE347740A (fr)	1927-01-07

Country Status (4)

Country	Link
US (1)	US1763054A (fr)
BE (1)	BE347740A (fr)
FR (1)	FR646684A (fr)
GB (1)	GB283211A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3114429A (en) *	1961-01-16	1963-12-17	Hoffman Electronics Corp	Loudspeaker

0
- BE BE347740D patent/BE347740A/xx unknown
1927
- 1927-01-07 US US159554A patent/US1763054A/en not_active Expired - Lifetime
1928
- 1928-01-02 GB GB32/28A patent/GB283211A/en not_active Expired
- 1928-01-03 FR FR646684D patent/FR646684A/fr not_active Expired

Also Published As

Publication number	Publication date
GB283211A (en)	1928-06-28
FR646684A (fr)	1928-11-14
US1763054A (en)	1930-06-10

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