FR590175A - Improvements to automatic telephone systems - Google Patents

Improvements to automatic telephone systems

Info

Publication number
FR590175A
FR590175A FR590175DA FR590175A FR 590175 A FR590175 A FR 590175A FR 590175D A FR590175D A FR 590175DA FR 590175 A FR590175 A FR 590175A
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.)
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 FR590175A publication Critical patent/FR590175A/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)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
FR590175D 1923-10-24 1924-10-21 Improvements to automatic telephone systems Expired FR590175A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US670557A US1632025A (en) 1923-10-24 1923-10-24 Automatic telephone system

Publications (1)

Publication Number Publication Date
FR590175A true FR590175A (en) 1925-06-12

Family

ID=24690875

Family Applications (1)

Application Number Title Priority Date Filing Date
FR590175D Expired FR590175A (en) 1923-10-24 1924-10-21 Improvements to automatic telephone systems

Country Status (3)

Country Link
US (1) US1632025A (en)
FR (1) FR590175A (en)
GB (1) GB223877A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2557388A (en) * 1947-05-28 1951-06-19 Automatic Elect Lab Automatic telephone system employing finder switches for connecting calling lines tonumerical switches

Also Published As

Publication number Publication date
US1632025A (en) 1927-06-14
GB223877A (en) 1925-09-03

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