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FR695053A - Improvements to telephone installations - Google Patents

Improvements to telephone installations

Info

Publication number
FR695053A
FR695053A FR695053DA FR695053A FR 695053 A FR695053 A FR 695053A FR 695053D A FR695053D A FR 695053DA FR 695053 A FR695053 A FR 695053A
Authority
FR
France
Prior art keywords
telephone installations
installations
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
Georges-Andre Chavet
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 FR695053A publication Critical patent/FR695053A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M5/00—Manual exchanges
    • H04M5/04—Arrangements for indicating calls or supervising connections for calling or clearing

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR695053D 1929-08-09 1929-08-09 Improvements to telephone installations Expired FR695053A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR695053T 1929-08-09

Publications (1)

Publication Number Publication Date
FR695053A true FR695053A (en) 1930-12-11

Family

ID=9045843

Family Applications (1)

Application Number Title Priority Date Filing Date
FR695053D Expired FR695053A (en) 1929-08-09 1929-08-09 Improvements to telephone installations

Country Status (1)

Country Link
FR (1) FR695053A (en)

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