FR22970E - Avertisseur - Google Patents

Avertisseur

Info

Publication number
FR22970E
FR22970E FR22970A FR22970DA FR22970E FR 22970 E FR22970 E FR 22970E FR 22970 A FR22970 A FR 22970A FR 22970D A FR22970D A FR 22970DA FR 22970 E FR22970 E FR 22970E
Authority
FR
France
Prior art keywords
warning
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
FR22970A
Other languages
English (en)
Inventor
Albert Legrand
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 FR22970E publication Critical patent/FR22970E/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/10—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers driven by mechanical means only

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
FR22970A 1920-04-14 1920-04-14 Avertisseur Expired FR22970E (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR22970T 1920-04-14

Publications (1)

Publication Number Publication Date
FR22970E true FR22970E (fr) 1921-09-19

Family

ID=8661769

Family Applications (1)

Application Number Title Priority Date Filing Date
FR22970A Expired FR22970E (fr) 1920-04-14 1920-04-14 Avertisseur

Country Status (1)

Country Link
FR (1) FR22970E (fr)

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