NL72183C - - Google Patents

Info

Publication number: NL72183C
Authority: NL; Netherlands

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.)

1949-04-06

Publication of NL72183C publication Critical patent/NL72183C/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
- 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)

NL72183D 1949-04-06 NL72183C (enrdf_load_html_response)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
FR987601T		1949-04-06

Publications (1)

Publication Number	Publication Date
NL72183C true NL72183C (enrdf_load_html_response)

Family

ID=9539031

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL72183D NL72183C (enrdf_load_html_response)	1949-04-06

Country Status (2)

Country	Link
FR (1)	FR987601A (enrdf_load_html_response)
NL (1)	NL72183C (enrdf_load_html_response)

0
- NL NL72183D patent/NL72183C/xx active
1949
- 1949-04-06 FR FR987601D patent/FR987601A/fr not_active Expired

Also Published As

Publication number	Publication date
FR987601A (fr)	1951-08-16

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