FR655256A - Improvements to semi-automatic telephone systems - Google Patents

Improvements to semi-automatic telephone systems

Info

Publication number
FR655256A
FR655256A FR655256DA FR655256A FR 655256 A FR655256 A FR 655256A FR 655256D A FR655256D A FR 655256DA FR 655256 A FR655256 A FR 655256A
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)
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 FR655256A publication Critical patent/FR655256A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
FR655256D 1927-09-23 1927-09-23 Improvements to semi-automatic telephone systems Expired FR655256A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR655256T 1927-09-23

Publications (1)

Publication Number Publication Date
FR655256A true FR655256A (en) 1929-04-17

Family

ID=9007005

Family Applications (1)

Application Number Title Priority Date Filing Date
FR655256D Expired FR655256A (en) 1927-09-23 1927-09-23 Improvements to semi-automatic telephone systems

Country Status (2)

Country Link
US (1) US1760640A (en)
FR (1) FR655256A (en)

Also Published As

Publication number Publication date
US1760640A (en) 1930-05-27

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