NL72183C - - Google Patents

Info

Publication number
NL72183C
NL72183C NL72183DA NL72183C NL 72183 C NL72183 C NL 72183C NL 72183D A NL72183D A NL 72183DA NL 72183 C NL72183 C NL 72183C
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.)
Publication of NL72183C publication Critical patent/NL72183C/xx

Links

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 (US20020051482A1-20020502-M00012.png)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
NL72183C true NL72183C (US20020051482A1-20020502-M00012.png)

Family

ID=9539031

Family Applications (1)

Application Number Title Priority Date Filing Date
NL72183D NL72183C (US20020051482A1-20020502-M00012.png) 1949-04-06

Country Status (2)

Country Link
FR (1) FR987601A (US20020051482A1-20020502-M00012.png)
NL (1) NL72183C (US20020051482A1-20020502-M00012.png)

Also Published As

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

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