BE349785A - - Google Patents

Info

Publication number: BE349785A
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.)

1928-02-02

Publication of BE349785A publication Critical patent/BE349785A/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)
Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Diaphragms For Electromechanical Transducers (AREA)

BE349785D 1928-02-02 BE349785A (ja)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
AT1808238X		1928-02-02

Publications (1)

Publication Number	Publication Date
BE349785A true BE349785A (ja)

Family

ID=3689007

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE349785D BE349785A (ja)	1928-02-02

Country Status (3)

Country	Link
US (1)	US1808238A (ja)
BE (1)	BE349785A (ja)
GB (1)	GB311461A (ja)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP2519028A1 (en) *	2009-12-25	2012-10-31	Pioneer Solutions Corporation	Speaker vibrator and speaker device

0
- BE BE349785D patent/BE349785A/xx unknown
1928
- 1928-02-13 GB GB4553/28A patent/GB311461A/en not_active Expired
- 1928-08-28 US US302466A patent/US1808238A/en not_active Expired - Lifetime

Also Published As

Publication number	Publication date
GB311461A (en)	1929-05-13
US1808238A (en)	1931-06-02

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