FR801693A - Improvements to microphones - Google Patents

Improvements to microphones

Info

Publication number: FR801693A
Authority: FR; France
Prior art keywords: microphones
Prior art date: 1935-02-07
Legal status (The legal status 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 status listed.): Expired

Application number

Other languages

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Siemens Brothers and Co Ltd

Original Assignee

Siemens Brothers and Co Ltd

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.)

1935-02-07

Filing date

1936-02-03

Publication date

1936-08-13

1936-02-03 Application filed by Siemens Brothers and Co Ltd filed Critical Siemens Brothers and Co Ltd

1936-08-13 Application granted granted Critical

1936-08-13 Publication of FR801693A publication Critical patent/FR801693A/en

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R21/00—Variable-resistance transducers
- H04R21/02—Microphones
- H04R21/021—Microphones with granular resistance material

Landscapes

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

FR801693D 1935-02-07 1936-02-03 Improvements to microphones Expired FR801693A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB801693X		1935-02-07

Publications (1)

Publication Number	Publication Date
FR801693A true FR801693A (en)	1936-08-13

Family

ID=10513601

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR801693D Expired FR801693A (en)	1935-02-07	1936-02-03	Improvements to microphones

Country Status (2)

Country	Link
BE (1)	BE413126A (en)
FR (1)	FR801693A (en)

0
- BE BE413126D patent/BE413126A/xx unknown
1936
- 1936-02-03 FR FR801693D patent/FR801693A/en not_active Expired

Also Published As

Publication number	Publication date
BE413126A (en)

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