BE457012A - - Google Patents

Info

Publication number: BE457012A
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.)

1943-08-28

Publication of BE457012A publication Critical patent/BE457012A/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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/08—Microphones

Landscapes

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

BE457012D 1943-08-28 BE457012A (US06623731-20030923-C00012.png)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE259863X		1943-08-28

Publications (1)

Publication Number	Publication Date
BE457012A true BE457012A (US06623731-20030923-C00012.png)

Family

ID=5966915

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE457012D BE457012A (US06623731-20030923-C00012.png)	1943-08-28

Country Status (3)

Country	Link
BE (1)	BE457012A (US06623731-20030923-C00012.png)
CH (1)	CH259863A (US06623731-20030923-C00012.png)
FR (1)	FR905352A (US06623731-20030923-C00012.png)

0
- BE BE457012D patent/BE457012A/xx unknown
1944
- 1944-05-22 CH CH259863D patent/CH259863A/de unknown
- 1944-06-23 FR FR905352D patent/FR905352A/fr not_active Expired

Also Published As

Publication number	Publication date
FR905352A (fr)	1945-12-03
CH259863A (de)	1949-02-15

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