FR702092A - Improvements to automatic and semi-automatic telephone systems - Google Patents

Improvements to automatic and semi-automatic telephone systems

Info

Publication number
FR702092A
FR702092A FR702092DA FR702092A FR 702092 A FR702092 A FR 702092A FR 702092D A FR702092D A FR 702092DA FR 702092 A FR702092 A FR 702092A
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Application granted granted Critical
Publication of FR702092A publication Critical patent/FR702092A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0008—Selecting arrangements using relay selectors in the switching stages

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Interface Circuits In Exchanges (AREA)
FR702092D 1929-07-09 1930-07-08 Improvements to automatic and semi-automatic telephone systems Expired FR702092A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE365032X 1929-07-09

Publications (1)

Publication Number Publication Date
FR702092A true FR702092A (en) 1931-03-28

Family

ID=20308984

Family Applications (1)

Application Number Title Priority Date Filing Date
FR702092D Expired FR702092A (en) 1929-07-09 1930-07-08 Improvements to automatic and semi-automatic telephone systems

Country Status (3)

Country Link
US (1) US1928849A (en)
FR (1) FR702092A (en)
GB (1) GB365032A (en)

Also Published As

Publication number Publication date
GB365032A (en) 1932-01-08
US1928849A (en) 1933-10-03

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