FR733139A - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR733139A
FR733139A FR733139DA FR733139A FR 733139 A FR733139 A FR 733139A FR 733139D A FR733139D A FR 733139DA FR 733139 A FR733139 A FR 733139A
Authority
FR
France
Prior art keywords
telephone systems
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.)
Associated Electric Laboratories Inc
Original Assignee
Associated Electric Laboratories Inc
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 Associated Electric Laboratories Inc filed Critical Associated Electric Laboratories Inc
Application granted granted Critical
Publication of FR733139A publication Critical patent/FR733139A/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)
FR733139D 1931-03-02 1932-02-26 Improvements to telephone systems Expired FR733139A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US519310A US1903207A (en) 1931-03-02 1931-03-02 Telephone system

Publications (1)

Publication Number Publication Date
FR733139A true FR733139A (en) 1932-09-30

Family

ID=24067754

Family Applications (1)

Application Number Title Priority Date Filing Date
FR733139D Expired FR733139A (en) 1931-03-02 1932-02-26 Improvements to telephone systems

Country Status (3)

Country Link
US (1) US1903207A (en)
FR (1) FR733139A (en)
GB (1) GB397912A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE865476C (en) * 1941-06-25 1953-02-02 Siemens Ag Circuit arrangement for telephone systems with main and sub-offices and dialer operation
GB592989A (en) * 1945-05-04 1947-10-06 Siemens Brothers & Co Ltd Improvements relating to automatic telephone systems
NL149217B (en) * 1949-10-07 Cassella Farbwerke Mainkur Ag PROCESS FOR THE PREPARATION OF ALKYD RESIN-FREE BINDERS FOR HEAT-HARDABLE COATINGS.
BE527777A (en) * 1953-04-27

Also Published As

Publication number Publication date
US1903207A (en) 1933-03-28
GB397912A (en) 1933-09-04

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