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FR667129A - Automatic telephone system - Google Patents

Automatic telephone system

Info

Publication number
FR667129A
FR667129A FR667129DA FR667129A FR 667129 A FR667129 A FR 667129A FR 667129D A FR667129D A FR 667129DA FR 667129 A FR667129 A FR 667129A
Authority
FR
France
Prior art keywords
telephone system
automatic telephone
automatic
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
Application filed by Associated Telephone and Telegraph Co filed Critical Associated Telephone and Telegraph Co
Application granted granted Critical
Publication of FR667129A publication Critical patent/FR667129A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
FR667129D 1927-10-08 1928-07-23 Automatic telephone system Expired FR667129A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE298474X 1927-10-08

Publications (1)

Publication Number Publication Date
FR667129A true FR667129A (en) 1929-10-12

Family

ID=3867377

Family Applications (2)

Application Number Title Priority Date Filing Date
FR667129D Expired FR667129A (en) 1927-10-08 1928-07-23 Automatic telephone system
FR667130D Expired FR667130A (en) 1927-10-08 1928-07-23 Automatic telephone system

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR667130D Expired FR667130A (en) 1927-10-08 1928-07-23 Automatic telephone system

Country Status (3)

Country Link
US (1) US1772561A (en)
FR (2) FR667129A (en)
GB (2) GB298474A (en)

Also Published As

Publication number Publication date
FR667130A (en) 1929-10-12
GB308366A (en) 1930-01-02
US1772561A (en) 1930-08-12
GB298474A (en) 1930-01-02

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