FR694716A - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR694716A
FR694716A FR694716DA FR694716A FR 694716 A FR694716 A FR 694716A FR 694716D A FR694716D A FR 694716DA FR 694716 A FR694716 A FR 694716A
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.)
Automatic Telephone Manufacturing Co Ltd
Original Assignee
Automatic Telephone Manufacturing Co Ltd
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 Automatic Telephone Manufacturing Co Ltd filed Critical Automatic Telephone Manufacturing Co Ltd
Application granted granted Critical
Publication of FR694716A publication Critical patent/FR694716A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q3/00Selecting arrangements
    • H04Q3/42Circuit 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)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
FR694716D 1929-05-01 1930-04-29 Improvements to telephone systems Expired FR694716A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB13556/29A GB332956A (en) 1929-05-01 1929-05-01 Improvements in or relating to telephone systems

Publications (1)

Publication Number Publication Date
FR694716A true FR694716A (en) 1930-12-06

Family

ID=10025074

Family Applications (1)

Application Number Title Priority Date Filing Date
FR694716D Expired FR694716A (en) 1929-05-01 1930-04-29 Improvements to telephone systems

Country Status (3)

Country Link
US (1) US1889564A (en)
FR (1) FR694716A (en)
GB (1) GB332956A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2682576A (en) * 1951-01-20 1954-06-29 Irving H Selden Telephone system
US2805288A (en) * 1953-11-12 1957-09-03 Gen Dynamics Corp Multi-office telephone system

Also Published As

Publication number Publication date
GB332956A (en) 1930-08-01
US1889564A (en) 1932-11-29

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