FR739331A - - Google Patents

Info

Publication number
FR739331A
FR739331A FR739331DA FR739331A FR 739331 A FR739331 A FR 739331A FR 739331D A FR739331D A FR 739331DA FR 739331 A FR739331 A FR 739331A
Authority
FR
France
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)
Publication date
Application granted granted Critical
Publication of FR739331A publication Critical patent/FR739331A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems, e.g. audible personal calling systems
    • G08B3/10—Audible signalling systems, e.g. audible personal calling systems using electric transmission; using electromagnetic transmission

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
FR739331D Expired FR739331A (cg-RX-API-DMAC7.html)

Publications (1)

Publication Number Publication Date
FR739331A true FR739331A (cg-RX-API-DMAC7.html) 1933-01-06

Family

ID=1545418

Family Applications (1)

Application Number Title Priority Date Filing Date
FR739331D Expired FR739331A (cg-RX-API-DMAC7.html)

Country Status (1)

Country Link
FR (1) FR739331A (cg-RX-API-DMAC7.html)

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