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FR803168A - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR803168A
FR803168A FR803168DA FR803168A FR 803168 A FR803168 A FR 803168A FR 803168D A FR803168D A FR 803168DA FR 803168 A FR803168 A FR 803168A
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.)
Compagnie des Telephones Thomson Houston
Original Assignee
Compagnie des Telephones Thomson Houston
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 Compagnie des Telephones Thomson Houston filed Critical Compagnie des Telephones Thomson Houston
Application granted granted Critical
Publication of FR803168A publication Critical patent/FR803168A/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)
FR803168D 1934-11-07 1935-11-07 Improvements to telephone systems Expired FR803168A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US751805A US2040637A (en) 1934-11-07 1934-11-07 Telephone system

Publications (1)

Publication Number Publication Date
FR803168A true FR803168A (en) 1936-09-24

Family

ID=25023550

Family Applications (1)

Application Number Title Priority Date Filing Date
FR803168D Expired FR803168A (en) 1934-11-07 1935-11-07 Improvements to telephone systems

Country Status (2)

Country Link
US (1) US2040637A (en)
FR (1) FR803168A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2707211A (en) * 1951-03-30 1955-04-26 Itt Adapter circuit

Also Published As

Publication number Publication date
US2040637A (en) 1936-05-12

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