FR50504E - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR50504E
FR50504E FR50504DA FR50504E FR 50504 E FR50504 E FR 50504E FR 50504D A FR50504D A FR 50504DA FR 50504 E FR50504 E FR 50504E
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 FR50504E publication Critical patent/FR50504E/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
    • H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
    • H04Q3/625—Arrangements in the private branch exchange

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
FR50504D 1939-03-24 1939-03-24 Improvements to telephone systems Expired FR50504E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR50504T 1939-03-24

Publications (1)

Publication Number Publication Date
FR50504E true FR50504E (en) 1940-12-26

Family

ID=8685501

Family Applications (1)

Application Number Title Priority Date Filing Date
FR50504D Expired FR50504E (en) 1939-03-24 1939-03-24 Improvements to telephone systems

Country Status (1)

Country Link
FR (1) FR50504E (en)

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