FR516355A - Improvements to telephone switchboards - Google Patents

Improvements to telephone switchboards

Info

Publication number
FR516355A
FR516355A FR516355A FR516355DA FR516355A FR 516355 A FR516355 A FR 516355A FR 516355 A FR516355 A FR 516355A FR 516355D A FR516355D A FR 516355DA FR 516355 A FR516355 A FR 516355A
Authority
FR
France
Prior art keywords
telephone switchboards
switchboards
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
FR516355A
Other languages
French (fr)
Inventor
De La Dynamo-Phare Eyquem
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.)
DYNAMO PHARE EYQUEM SA
Original Assignee
DYNAMO PHARE EYQUEM SA
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 DYNAMO PHARE EYQUEM SA filed Critical DYNAMO PHARE EYQUEM SA
Application granted granted Critical
Publication of FR516355A publication Critical patent/FR516355A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M5/00—Manual exchanges
    • H04M5/02—Constructional details

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR516355A 1917-08-30 1917-08-30 Improvements to telephone switchboards Expired FR516355A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR516355T 1917-08-30

Publications (1)

Publication Number Publication Date
FR516355A true FR516355A (en) 1921-04-18

Family

ID=8915231

Family Applications (1)

Application Number Title Priority Date Filing Date
FR516355A Expired FR516355A (en) 1917-08-30 1917-08-30 Improvements to telephone switchboards

Country Status (1)

Country Link
FR (1) FR516355A (en)

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