FR803389A - Improvements to telephone connections by loudspeaker stations - Google Patents

Improvements to telephone connections by loudspeaker stations

Info

Publication number
FR803389A
FR803389A FR803389DA FR803389A FR 803389 A FR803389 A FR 803389A FR 803389D A FR803389D A FR 803389DA FR 803389 A FR803389 A FR 803389A
Authority
FR
France
Prior art keywords
telephone connections
loudspeaker stations
loudspeaker
stations
telephone
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
Levy
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 FR803389A publication Critical patent/FR803389A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/001—Two-way communication systems between a limited number of parties

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR803389D 1935-06-20 1935-06-20 Improvements to telephone connections by loudspeaker stations Expired FR803389A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR803389T 1935-06-20

Publications (1)

Publication Number Publication Date
FR803389A true FR803389A (en) 1936-09-29

Family

ID=9250142

Family Applications (1)

Application Number Title Priority Date Filing Date
FR803389D Expired FR803389A (en) 1935-06-20 1935-06-20 Improvements to telephone connections by loudspeaker stations

Country Status (1)

Country Link
FR (1) FR803389A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2545467A (en) * 1948-08-12 1951-03-20 Le Teleampliphone Soc Two-way loud-speaker telephone installation
US2850569A (en) * 1953-09-07 1958-09-02 Defensor A G Electric arrangement for speech transmission in two directions

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2545467A (en) * 1948-08-12 1951-03-20 Le Teleampliphone Soc Two-way loud-speaker telephone installation
US2850569A (en) * 1953-09-07 1958-09-02 Defensor A G Electric arrangement for speech transmission in two directions

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