FR420831A - Optical signaling device - Google Patents

Optical signaling device

Info

Publication number
FR420831A
FR420831A FR420831DA FR420831A FR 420831 A FR420831 A FR 420831A FR 420831D A FR420831D A FR 420831DA FR 420831 A FR420831 A FR 420831A
Authority
FR
France
Prior art keywords
signaling device
optical signaling
optical
signaling
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
Joergen Jensen
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR420831A publication Critical patent/FR420831A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR420831D 1910-03-31 1910-09-27 Optical signaling device Expired FR420831A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO420831X 1910-03-31

Publications (1)

Publication Number Publication Date
FR420831A true FR420831A (en) 1911-02-08

Family

ID=1463930

Family Applications (1)

Application Number Title Priority Date Filing Date
FR420831D Expired FR420831A (en) 1910-03-31 1910-09-27 Optical signaling device

Country Status (1)

Country Link
FR (1) FR420831A (en)

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