FR220488A - - Google Patents

Info

Publication number
FR220488A
FR220488A FR220488DA FR220488A FR 220488 A FR220488 A FR 220488A FR 220488D A FR220488D A FR 220488DA FR 220488 A FR220488 A FR 220488A
Authority
FR
France
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.)
Active
Application number
Other languages
French (fr)
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 FR220488A publication Critical patent/FR220488A/fr
Active legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R21/00Variable-resistance transducers
    • H04R21/02Microphones
    • H04R21/028Microphones with a fluid as resistance material

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Toys (AREA)
FR220488D 1909-01-16 Active FR220488A (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT190913922X 1909-01-16

Publications (1)

Publication Number Publication Date
FR220488A true FR220488A (de)

Family

ID=32512950

Family Applications (1)

Application Number Title Priority Date Filing Date
FR220488D Active FR220488A (de) 1909-01-16

Country Status (2)

Country Link
FR (1) FR220488A (de)
GB (1) GB190913922A (de)

Also Published As

Publication number Publication date
GB190913922A (en)

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