FR861824A - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR861824A
FR861824A FR861824DA FR861824A FR 861824 A FR861824 A FR 861824A FR 861824D A FR861824D A FR 861824DA FR 861824 A FR861824 A FR 861824A
Authority
FR
France
Prior art keywords
telephone systems
telephone
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)
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.)
Compagnie des Telephones Thomson Houston
Original Assignee
Compagnie des Telephones Thomson Houston
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 Compagnie des Telephones Thomson Houston filed Critical Compagnie des Telephones Thomson Houston
Application granted granted Critical
Publication of FR861824A publication Critical patent/FR861824A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/58—Arrangements for transferring received calls from one subscriber to another; Arrangements affording interim conversations between either the calling or the called party and a third party

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR861824D 1939-08-08 1939-08-08 Improvements to telephone systems Expired FR861824A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR861824T 1939-08-08

Publications (1)

Publication Number Publication Date
FR861824A true FR861824A (en) 1941-02-18

Family

ID=9342344

Family Applications (1)

Application Number Title Priority Date Filing Date
FR861824D Expired FR861824A (en) 1939-08-08 1939-08-08 Improvements to telephone systems

Country Status (1)

Country Link
FR (1) FR861824A (en)

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