FR932189A - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR932189A
FR932189A FR932189DA FR932189A FR 932189 A FR932189 A FR 932189A FR 932189D A FR932189D A FR 932189DA FR 932189 A FR932189 A FR 932189A
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 Electric Laboratories Inc
Original Assignee
Automatic 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 Automatic Electric Laboratories Inc filed Critical Automatic Electric Laboratories Inc
Application granted granted Critical
Publication of FR932189A publication Critical patent/FR932189A/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)
  • Interface Circuits In Exchanges (AREA)
FR932189D 1940-06-22 1946-08-12 Improvements to telephone systems Expired FR932189A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB10748/40A GB542039A (en) 1940-06-22 1940-06-22 Improvements in or relating to telephone systems

Publications (1)

Publication Number Publication Date
FR932189A true FR932189A (en) 1948-03-15

Family

ID=9973553

Family Applications (1)

Application Number Title Priority Date Filing Date
FR932189D Expired FR932189A (en) 1940-06-22 1946-08-12 Improvements to telephone systems

Country Status (4)

Country Link
US (1) US2307855A (en)
BE (1) BE464871A (en)
FR (1) FR932189A (en)
GB (1) GB542039A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2904633A (en) * 1954-08-06 1959-09-15 Gen Telephone Lab Inc Party line paystation
US2870263A (en) * 1955-02-25 1959-01-20 Gen Dynamics Corp Radio or carrier terminal dial selector
US2971085A (en) * 1956-06-22 1961-02-07 Automatic Elect Lab Selective signaling radiotelephone system
US3016426A (en) * 1957-10-04 1962-01-09 Bell Telephone Labor Inc Multiparty selective signaling system

Also Published As

Publication number Publication date
BE464871A (en)
US2307855A (en) 1943-01-12
GB542039A (en) 1941-12-23

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