FR705724A - Improvement on alarm systems - Google Patents

Improvement on alarm systems

Info

Publication number
FR705724A
FR705724A FR705724DA FR705724A FR 705724 A FR705724 A FR 705724A FR 705724D A FR705724D A FR 705724DA FR 705724 A FR705724 A FR 705724A
Authority
FR
France
Prior art keywords
improvement
alarm systems
alarm
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)
Inventor
Georges-Albert Ferret
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 filed Critical
Application granted granted Critical
Publication of FR705724A publication Critical patent/FR705724A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR705724D 1930-09-05 1930-09-05 Improvement on alarm systems Expired FR705724A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR705724T 1930-09-05

Publications (1)

Publication Number Publication Date
FR705724A true FR705724A (en) 1931-06-11

Family

ID=9067358

Family Applications (1)

Application Number Title Priority Date Filing Date
FR705724D Expired FR705724A (en) 1930-09-05 1930-09-05 Improvement on alarm systems

Country Status (1)

Country Link
FR (1) FR705724A (en)

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