FR753279A - Improvements to automatic telephone systems - Google Patents

Improvements to automatic telephone systems

Info

Publication number
FR753279A
FR753279A FR753279DA FR753279A FR 753279 A FR753279 A FR 753279A FR 753279D A FR753279D A FR 753279DA FR 753279 A FR753279 A FR 753279A
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Application granted granted Critical
Publication of FR753279A publication Critical patent/FR753279A/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)
FR753279D 1932-04-01 1933-03-30 Improvements to automatic telephone systems Expired FR753279A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE753279X 1932-04-01

Publications (1)

Publication Number Publication Date
FR753279A true FR753279A (en) 1933-10-12

Family

ID=20326522

Family Applications (1)

Application Number Title Priority Date Filing Date
FR753279D Expired FR753279A (en) 1932-04-01 1933-03-30 Improvements to automatic telephone systems

Country Status (1)

Country Link
FR (1) FR753279A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE741283C (en) * 1938-10-15 1943-11-09 Siemens Ag Circuit arrangement for telephone systems with double-directional, sealed off connecting lines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE741283C (en) * 1938-10-15 1943-11-09 Siemens Ag Circuit arrangement for telephone systems with double-directional, sealed off connecting lines

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