FR591871A - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR591871A
FR591871A FR591871DA FR591871A FR 591871 A FR591871 A FR 591871A FR 591871D A FR591871D A FR 591871DA FR 591871 A FR591871 A FR 591871A
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR591871A publication Critical patent/FR591871A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M5/00—Manual exchanges
    • H04M5/10—Manual exchanges using separate plug for each subscriber

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR591871D 1924-12-09 1924-12-09 Improvements to telephone systems Expired FR591871A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR591871T 1924-12-09

Publications (1)

Publication Number Publication Date
FR591871A true FR591871A (en) 1925-07-20

Family

ID=8964395

Family Applications (1)

Application Number Title Priority Date Filing Date
FR591871D Expired FR591871A (en) 1924-12-09 1924-12-09 Improvements to telephone systems

Country Status (1)

Country Link
FR (1) FR591871A (en)

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