BE379817A - - Google Patents

Info

Publication number: BE379817A
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.)

1930-05-14

Publication of BE379817A publication Critical patent/BE379817A/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
- H04R9/06—Loudspeakers
- 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
- H04R9/02—Details
- H04R9/025—Magnetic circuit

Landscapes

Physics & Mathematics (AREA)
Engineering & Computer Science (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

BE379817D 1930-05-14 BE379817A (enrdf_load_html_response)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US452154A US1905704A (en)	1930-05-14	1930-05-14	Acoustic device

Publications (1)

Publication Number	Publication Date
BE379817A true BE379817A (enrdf_load_html_response)

Family

ID=23795266

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE379817D BE379817A (enrdf_load_html_response)	1930-05-14

Country Status (3)

Country	Link
US (1)	US1905704A (enrdf_load_html_response)
BE (1)	BE379817A (enrdf_load_html_response)
FR (1)	FR716994A (enrdf_load_html_response)

0
- BE BE379817D patent/BE379817A/xx unknown
1930
- 1930-05-14 US US452154A patent/US1905704A/en not_active Expired - Lifetime
1931
- 1931-05-13 FR FR716994D patent/FR716994A/fr not_active Expired

Also Published As

Publication number	Publication date
US1905704A (en)	1933-04-25
FR716994A (fr)	1931-12-30

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