FR55348E - Improvements to semi-automatic telephone systems - Google Patents

Improvements to semi-automatic telephone systems

Info

Publication number
FR55348E
FR55348E FR55348DA FR55348E FR 55348 E FR55348 E FR 55348E FR 55348D A FR55348D A FR 55348DA FR 55348 E FR55348 E FR 55348E
Authority
FR
France
Prior art keywords
semi
telephone systems
automatic telephone
automatic
systems
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
Fernand-Pierre Gohorel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thales SA
Original Assignee
CSF Compagnie Generale de Telegraphie sans Fil SA
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 by CSF Compagnie Generale de Telegraphie sans Fil SA filed Critical CSF Compagnie Generale de Telegraphie sans Fil SA
Application granted granted Critical
Publication of FR55348E publication Critical patent/FR55348E/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR55348D 1947-04-24 1947-04-24 Improvements to semi-automatic telephone systems Expired FR55348E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR55348T 1947-04-24

Publications (1)

Publication Number Publication Date
FR55348E true FR55348E (en) 1952-01-02

Family

ID=8689671

Family Applications (2)

Application Number Title Priority Date Filing Date
FR938916D Expired FR938916A (en) 1947-04-24 1946-12-31 Improvements to semi-automatic telephone systems
FR55348D Expired FR55348E (en) 1947-04-24 1947-04-24 Improvements to semi-automatic telephone systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR938916D Expired FR938916A (en) 1947-04-24 1946-12-31 Improvements to semi-automatic telephone systems

Country Status (1)

Country Link
FR (2) FR938916A (en)

Also Published As

Publication number Publication date
FR938916A (en) 1948-10-28

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