FR946554A - Improvements to telephone devices - Google Patents

Improvements to telephone devices

Info

Publication number
FR946554A
FR946554A FR946554DA FR946554A FR 946554 A FR946554 A FR 946554A FR 946554D A FR946554D A FR 946554DA FR 946554 A FR946554 A FR 946554A
Authority
FR
France
Prior art keywords
telephone devices
telephone
devices
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
Priority claimed from US364824A external-priority patent/US2333489A/en
Application filed by Automatic Electric Laboratories Inc filed Critical Automatic Electric Laboratories Inc
Application granted granted Critical
Publication of FR946554A publication Critical patent/FR946554A/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)
FR946554D 1940-11-08 1947-05-12 Improvements to telephone devices Expired FR946554A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US364824A US2333489A (en) 1940-11-08 1940-11-08 Telephone system
US448961A US2340555A (en) 1940-11-08 1942-06-29 Telephone system

Publications (1)

Publication Number Publication Date
FR946554A true FR946554A (en) 1949-06-08

Family

ID=27002669

Family Applications (1)

Application Number Title Priority Date Filing Date
FR946554D Expired FR946554A (en) 1940-11-08 1947-05-12 Improvements to telephone devices

Country Status (2)

Country Link
US (1) US2340555A (en)
FR (1) FR946554A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2567650A (en) * 1947-04-23 1951-09-11 Stromberg Carlson Co Automatic telephone system
US2542272A (en) * 1947-08-22 1951-02-20 Automatic Elect Lab Connector switch for telephone systems
US2874223A (en) * 1953-08-27 1959-02-17 Itt Mixed-ringing party-line telephone system
US3025353A (en) * 1957-07-25 1962-03-13 Gen Dynamics Corp Transfer means for reverting call circuit
DE1065888B (en) * 1958-08-20 1959-09-24

Also Published As

Publication number Publication date
US2340555A (en) 1944-02-01

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