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FR687017A - Improvements to automatic or semi-automatic telephone systems - Google Patents

Improvements to automatic or semi-automatic telephone systems

Info

Publication number
FR687017A
FR687017A FR687017DA FR687017A FR 687017 A FR687017 A FR 687017A FR 687017D A FR687017D A FR 687017DA FR 687017 A FR687017 A FR 687017A
Authority
FR
France
Prior art keywords
automatic
semi
telephone systems
automatic 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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR687017A publication Critical patent/FR687017A/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)
FR687017D 1928-12-20 1929-12-04 Improvements to automatic or semi-automatic telephone systems Expired FR687017A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3771928A GB328314A (en) 1928-12-20 1928-12-20 Improvements in or relating to telephone systems

Publications (1)

Publication Number Publication Date
FR687017A true FR687017A (en) 1930-08-04

Family

ID=10398540

Family Applications (1)

Application Number Title Priority Date Filing Date
FR687017D Expired FR687017A (en) 1928-12-20 1929-12-04 Improvements to automatic or semi-automatic telephone systems

Country Status (3)

Country Link
DE (1) DE597793C (en)
FR (1) FR687017A (en)
GB (2) GB328314A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL84720C (en) * 1950-06-16
BE511771A (en) * 1951-04-11
DE960828C (en) * 1952-10-24 1957-03-28 Siemens Ag Circuit arrangement for multiple use of connection devices

Also Published As

Publication number Publication date
DE597793C (en) 1934-06-08
GB328314A (en) 1930-04-22
GB328611A (en) 1930-04-30

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