FR683358A - Improvements to automatic telephone systems - Google Patents

Improvements to automatic telephone systems

Info

Publication number
FR683358A
FR683358A FR683358DA FR683358A FR 683358 A FR683358 A FR 683358A FR 683358D A FR683358D A FR 683358DA FR 683358 A FR683358 A FR 683358A
Authority
FR
France
Prior art keywords
telephone systems
automatic telephone
automatic
systems
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.)
Associated Telephone and Telegraph Co
Original Assignee
Associated Telephone and Telegraph Co
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23279460&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=FR683358(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Associated Telephone and Telegraph Co filed Critical Associated Telephone and Telegraph Co
Application granted granted Critical
Publication of FR683358A publication Critical patent/FR683358A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
    • H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
    • H04Q3/625—Arrangements in the private branch exchange

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Interface Circuits In Exchanges (AREA)
FR683358D 1928-12-24 1929-10-16 Improvements to automatic telephone systems Expired FR683358A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US328089A US1792454A (en) 1928-12-24 1928-12-24 Automatic telephone system

Publications (1)

Publication Number Publication Date
FR683358A true FR683358A (en) 1930-06-11

Family

ID=23279460

Family Applications (1)

Application Number Title Priority Date Filing Date
FR683358D Expired FR683358A (en) 1928-12-24 1929-10-16 Improvements to automatic telephone systems

Country Status (3)

Country Link
US (1) US1792454A (en)
FR (1) FR683358A (en)
GB (1) GB334534A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB588563A (en) * 1944-08-25 1947-05-28 Automatic Telephone & Elect Improvements in or relating to telephone systems
US2486231A (en) * 1945-06-29 1949-10-25 Automatic Elect Lab Private automatic telephone exchanges employing nonnumerical switches for interconnecting local lines, and for interconnecting local lines and trunk lines

Also Published As

Publication number Publication date
GB334534A (en) 1930-09-04
US1792454A (en) 1931-02-10

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