FR711122A - Improvements to automatic or semi-automatic telephone systems - Google Patents

Improvements to automatic or semi-automatic telephone systems

Info

Publication number
FR711122A
FR711122A FR711122DA FR711122A FR 711122 A FR711122 A FR 711122A FR 711122D A FR711122D A FR 711122DA FR 711122 A FR711122 A FR 711122A
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 FR711122A publication Critical patent/FR711122A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
FR711122D 1929-02-14 1930-05-12 Improvements to automatic or semi-automatic telephone systems Expired FR711122A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4934/29A GB329366A (en) 1929-02-14 1929-02-14 Improvements in or relating to automatic or semi-automatic telephone systems

Publications (1)

Publication Number Publication Date
FR711122A true FR711122A (en) 1931-09-03

Family

ID=9786600

Family Applications (1)

Application Number Title Priority Date Filing Date
FR711122D Expired FR711122A (en) 1929-02-14 1930-05-12 Improvements to automatic or semi-automatic telephone systems

Country Status (4)

Country Link
US (1) US1851482A (en)
DE (1) DE543478C (en)
FR (1) FR711122A (en)
GB (1) GB329366A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2597007A (en) * 1942-03-31 1952-05-20 Int Standard Electric Corp Common control circuit for operating switches rearward to calling line
GB655974A (en) * 1946-11-14 1951-08-08 Claesson Harry Elias Automatic switching arrangement
US2711444A (en) * 1951-05-19 1955-06-21 Nederlanden Staat Junction diagram for automatic switching system
US2813929A (en) * 1951-11-12 1957-11-19 Nederlanden Staat Automatic signalling system

Also Published As

Publication number Publication date
GB329366A (en) 1930-05-14
DE543478C (en) 1932-02-09
US1851482A (en) 1932-03-29

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