FR812019A - Improvements to telephone connections by loudspeaker stations - Google Patents

Improvements to telephone connections by loudspeaker stations

Info

Publication number
FR812019A
FR812019A FR812019DA FR812019A FR 812019 A FR812019 A FR 812019A FR 812019D A FR812019D A FR 812019DA FR 812019 A FR812019 A FR 812019A
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 FR812019A publication Critical patent/FR812019A/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)
FR812019D 1936-01-10 1936-01-10 Improvements to telephone connections by loudspeaker stations Expired FR812019A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR812019T 1936-01-10

Publications (1)

Publication Number Publication Date
FR812019A true FR812019A (en) 1937-04-28

Family

ID=9263451

Family Applications (1)

Application Number Title Priority Date Filing Date
FR812019D Expired FR812019A (en) 1936-01-10 1936-01-10 Improvements to telephone connections by loudspeaker stations

Country Status (1)

Country Link
FR (1) FR812019A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2545466A (en) * 1948-07-10 1951-03-20 Le Teleampliphone Soc Loud-speaker telephone installation
US2655557A (en) * 1947-12-22 1953-10-13 Stanbury Keith Simmons Apparatus for use in telephone or like communication systems
FR2125471A1 (en) * 1971-02-19 1972-09-29 Alfa Laval Ab

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2655557A (en) * 1947-12-22 1953-10-13 Stanbury Keith Simmons Apparatus for use in telephone or like communication systems
US2545466A (en) * 1948-07-10 1951-03-20 Le Teleampliphone Soc Loud-speaker telephone installation
FR2125471A1 (en) * 1971-02-19 1972-09-29 Alfa Laval Ab

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