BE389124A - - Google Patents

Info

Publication number: BE389124A
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.)

1931-06-10

Publication of BE389124A publication Critical patent/BE389124A/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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/42—Combinations of transducers with fluid-pressure or other non-electrical amplifying means

Landscapes

Physics & Mathematics (AREA)
Engineering & Computer Science (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Details Of Valves (AREA)
Golf Clubs (AREA)

BE389124D 1931-06-10 BE389124A (is")

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US543341A US1935185A (en)	1931-06-10	1931-06-10	Sound producing device

Publications (1)

Publication Number	Publication Date
BE389124A true BE389124A (is")

Family

ID=24167593

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE389124D BE389124A (is")	1931-06-10

Country Status (4)

Country	Link
US (1)	US1935185A (is")
BE (1)	BE389124A (is")
DE (1)	DE651418C (is")
GB (1)	GB388269A (is")

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS5936480B2 (ja) *	1976-02-10	1984-09-04	ソニー株式会社	スピ−カ装置

0
- BE BE389124D patent/BE389124A/xx unknown
1931
- 1931-06-10 US US543341A patent/US1935185A/en not_active Expired - Lifetime
1932
- 1932-06-10 GB GB16477/32A patent/GB388269A/en not_active Expired
- 1932-06-11 DE DER85131D patent/DE651418C/de not_active Expired

Also Published As

Publication number	Publication date
US1935185A (en)	1933-11-14
DE651418C (de)	1937-10-13
GB388269A (en)	1933-02-23

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