FR671532A - Improvements to automatic telephone systems - Google Patents

Improvements to automatic telephone systems

Info

Publication number
FR671532A
FR671532A FR671532DA FR671532A FR 671532 A FR671532 A FR 671532A FR 671532D A FR671532D A FR 671532DA FR 671532 A FR671532 A FR 671532A
Authority
FR
France
Prior art keywords
telephone systems
automatic telephone
automatic
systems
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)
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 Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston 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
Priority claimed from GB3336827A external-priority patent/GB307538A/en
Application filed by Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR671532A publication Critical patent/FR671532A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
FR671532D 1927-12-09 1929-03-15 Improvements to automatic telephone systems Expired FR671532A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3336827A GB307538A (en) 1927-12-09 1927-12-09 Improvements in or relating to telephone systems
US307913XA 1928-03-17 1928-03-17

Publications (1)

Publication Number Publication Date
FR671532A true FR671532A (en) 1929-12-13

Family

ID=26261843

Family Applications (1)

Application Number Title Priority Date Filing Date
FR671532D Expired FR671532A (en) 1927-12-09 1929-03-15 Improvements to automatic telephone systems

Country Status (2)

Country Link
FR (1) FR671532A (en)
GB (1) GB307913A (en)

Also Published As

Publication number Publication date
GB307913A (en) 1930-03-27

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