BE447677A - - Google Patents

Info

Publication number
BE447677A
BE447677A BE447677DA BE447677A BE 447677 A BE447677 A BE 447677A BE 447677D A BE447677D A BE 447677DA BE 447677 A BE447677 A BE 447677A
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 BE447677A publication Critical patent/BE447677A/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
    • H04R21/04—Gramophone pick-ups using a stylus; Recorders using a stylus

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Lubricants (AREA)
BE447677D 1941-10-24 BE447677A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR879597T 1941-10-24

Publications (1)

Publication Number Publication Date
BE447677A true BE447677A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Family

ID=9361883

Family Applications (1)

Application Number Title Priority Date Filing Date
BE447677D BE447677A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1941-10-24

Country Status (3)

Country Link
US (1) US2382692A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE447677A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR879597A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2432066A (en) * 1945-04-26 1947-12-02 Well Surveys Inc Commutator design
US2542457A (en) * 1946-12-31 1951-02-20 Soundscriber Corp Electrodynamic pickup
US2566761A (en) * 1948-12-07 1951-09-04 Dubilier William Hearing aid

Also Published As

Publication number Publication date
US2382692A (en) 1945-08-14
FR879597A (fr) 1943-02-26

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