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FR781004A - Improvements to radio-phono-telephone devices - Google Patents

Improvements to radio-phono-telephone devices

Info

Publication number
FR781004A
FR781004A FR781004DA FR781004A FR 781004 A FR781004 A FR 781004A FR 781004D A FR781004D A FR 781004DA FR 781004 A FR781004 A FR 781004A
Authority
FR
France
Prior art keywords
phono
radio
telephone devices
telephone
devices
Prior art date
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.)
Expired
Application number
Other languages
French (fr)
Inventor
Louis Paul Durand
Pier Carlo Ricchiardi
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.)
Filing date
Publication date
Application filed filed Critical
Application granted granted Critical
Publication of FR781004A publication Critical patent/FR781004A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/20—Circuits for coupling gramophone pick-up, recorder output, or microphone to receiver

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
FR781004D 1934-02-02 1934-02-02 Improvements to radio-phono-telephone devices Expired FR781004A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR781004T 1934-02-02

Publications (1)

Publication Number Publication Date
FR781004A true FR781004A (en) 1935-05-08

Family

ID=9206698

Family Applications (2)

Application Number Title Priority Date Filing Date
FR780266D Expired FR780266A (en) 1934-02-02 1934-01-09 Radio-phono-telephone device
FR781004D Expired FR781004A (en) 1934-02-02 1934-02-02 Improvements to radio-phono-telephone devices

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR780266D Expired FR780266A (en) 1934-02-02 1934-01-09 Radio-phono-telephone device

Country Status (2)

Country Link
BE (1) BE407140A (en)
FR (2) FR780266A (en)

Also Published As

Publication number Publication date
BE407140A (en)
FR780266A (en) 1935-04-23

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