FR456538A - Warning system or communications by sound or light signals - Google Patents

Warning system or communications by sound or light signals

Info

Publication number
FR456538A
FR456538A FR456538A FR456538DA FR456538A FR 456538 A FR456538 A FR 456538A FR 456538 A FR456538 A FR 456538A FR 456538D A FR456538D A FR 456538DA FR 456538 A FR456538 A FR 456538A
Authority
FR
France
Prior art keywords
communications
sound
warning system
light signals
signals
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
FR456538A
Other languages
French (fr)
Inventor
Claude Chetail
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.)
CLAUDE CHETAIL
Original Assignee
CLAUDE CHETAIL
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 CLAUDE CHETAIL filed Critical CLAUDE CHETAIL
Application granted granted Critical
Publication of FR456538A publication Critical patent/FR456538A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F19/00—Advertising or display means not otherwise provided for

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Marketing (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
FR456538A 1912-06-20 1912-06-20 Warning system or communications by sound or light signals Expired FR456538A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR456538T 1912-06-20

Publications (1)

Publication Number Publication Date
FR456538A true FR456538A (en) 1913-08-28

Family

ID=1496321

Family Applications (1)

Application Number Title Priority Date Filing Date
FR456538A Expired FR456538A (en) 1912-06-20 1912-06-20 Warning system or communications by sound or light signals

Country Status (1)

Country Link
FR (1) FR456538A (en)

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