FR819791A - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR819791A
FR819791A FR819791DA FR819791A FR 819791 A FR819791 A FR 819791A FR 819791D A FR819791D A FR 819791DA FR 819791 A FR819791 A FR 819791A
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 FR819791A publication Critical patent/FR819791A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Meter Arrangements (AREA)
FR819791D 1936-04-03 1937-03-26 Improvements to telephone systems Expired FR819791A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9973/36A GB473003A (en) 1936-04-03 1936-04-03 Improvements in telephone systems

Publications (1)

Publication Number Publication Date
FR819791A true FR819791A (en) 1937-10-26

Family

ID=9882179

Family Applications (1)

Application Number Title Priority Date Filing Date
FR819791D Expired FR819791A (en) 1936-04-03 1937-03-26 Improvements to telephone systems

Country Status (3)

Country Link
US (1) US2232189A (en)
FR (1) FR819791A (en)
GB (2) GB473015A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB580010A (en) * 1944-02-16 1946-08-23 Automatic Telephone & Elect Improvements in or relating to telephone systems and automatic switches for use therein
US2543022A (en) * 1945-08-03 1951-02-27 Standard Telephones Cables Ltd Metering circuit control for automatic telephone systems

Also Published As

Publication number Publication date
GB473003A (en) 1937-10-04
US2232189A (en) 1941-02-18
GB473015A (en) 1937-10-04

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