FR838511A - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR838511A
FR838511A FR838511DA FR838511A FR 838511 A FR838511 A FR 838511A FR 838511D A FR838511D A FR 838511DA FR 838511 A FR838511 A FR 838511A
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 FR838511A publication Critical patent/FR838511A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0008—Selecting arrangements using relay selectors in the switching stages

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
FR838511D 1937-05-29 1938-05-28 Improvements to telephone systems Expired FR838511A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US145543A US2145127A (en) 1937-05-29 1937-05-29 Telephone system

Publications (1)

Publication Number Publication Date
FR838511A true FR838511A (en) 1939-03-08

Family

ID=22513580

Family Applications (1)

Application Number Title Priority Date Filing Date
FR838511D Expired FR838511A (en) 1937-05-29 1938-05-28 Improvements to telephone systems

Country Status (2)

Country Link
US (1) US2145127A (en)
FR (1) FR838511A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2433359A (en) * 1941-05-13 1947-12-30 Int Standard Electric Corp Multirural semiautomatic telephone exchange system

Also Published As

Publication number Publication date
US2145127A (en) 1939-01-24

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