FR717840A - Improvements to telephone installations - Google Patents

Improvements to telephone installations

Info

Publication number
FR717840A
FR717840A FR717840DA FR717840A FR 717840 A FR717840 A FR 717840A FR 717840D A FR717840D A FR 717840DA FR 717840 A FR717840 A FR 717840A
Authority
FR
France
Prior art keywords
telephone installations
installations
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.)
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 FR717840A publication Critical patent/FR717840A/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)
FR717840D 1930-05-31 1931-05-27 Improvements to telephone installations Expired FR717840A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE379370X 1930-05-31

Publications (1)

Publication Number Publication Date
FR717840A true FR717840A (en) 1932-01-14

Family

ID=20309166

Family Applications (1)

Application Number Title Priority Date Filing Date
FR717840D Expired FR717840A (en) 1930-05-31 1931-05-27 Improvements to telephone installations

Country Status (4)

Country Link
US (1) US1877672A (en)
DE (1) DE575604C (en)
FR (1) FR717840A (en)
GB (1) GB379370A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL141861B (en) * 1948-08-12 Murphy Chemical Ltd PROCESS FOR PREPARING ESTERS OF 2,6-DINITRO-4-ALKYLPHENOL AND OF PREPARATIONS CONTAINING THESE ESTERS.
GB761111A (en) * 1953-08-07 1956-11-07 Automatic Telephone & Elect Improvements in or relating to telephone systems

Also Published As

Publication number Publication date
US1877672A (en) 1932-09-13
GB379370A (en) 1932-08-29
DE575604C (en) 1933-04-29

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