FR418533A - Perfectionnements aux microphones - Google Patents

Perfectionnements aux microphones

Info

Publication number: FR418533A
Authority: FR; France
Prior art keywords: refinements; microphone; microphone refinements
Prior art date: 1910-07-23
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

Inventor

Emmanuel Hutter

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.)

Individual

Original Assignee

Individual

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.)

1910-07-23

Filing date

1910-07-23

Publication date

1910-12-12

1910-07-23 Application filed by Individual filed Critical Individual

1910-12-12 Application granted granted Critical

1910-12-12 Publication of FR418533A publication Critical patent/FR418533A/fr

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R21/00—Variable-resistance transducers
- H04R21/02—Microphones

Landscapes

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

FR418533D 1910-07-23 1910-07-23 Perfectionnements aux microphones Expired FR418533A (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
FR418533T		1910-07-23

Publications (1)

Publication Number	Publication Date
FR418533A true FR418533A (fr)	1910-12-12

Family

ID=1461842

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR418533D Expired FR418533A (fr)	1910-07-23	1910-07-23	Perfectionnements aux microphones

Country Status (1)

Country	Link
FR (1)	FR418533A (fr)

1910
- 1910-07-23 FR FR418533D patent/FR418533A/fr not_active Expired

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