BE439094A - - Google Patents

Info

Publication number
BE439094A
BE439094A BE439094DA BE439094A BE 439094 A BE439094 A BE 439094A BE 439094D A BE439094D A BE 439094DA BE 439094 A BE439094 A BE 439094A
Authority
BE
Belgium
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 BE439094A publication Critical patent/BE439094A/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
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H04R17/04—Gramophone pick-ups using a stylus; Recorders using a stylus

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
BE439094D 1939-08-07 BE439094A (zh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE218925X 1939-08-07

Publications (1)

Publication Number Publication Date
BE439094A true BE439094A (zh)

Family

ID=5831568

Family Applications (1)

Application Number Title Priority Date Filing Date
BE439094D BE439094A (zh) 1939-08-07

Country Status (2)

Country Link
BE (1) BE439094A (zh)
CH (1) CH218925A (zh)

Also Published As

Publication number Publication date
CH218925A (de) 1942-01-15

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