FR21135E - Amplificateur de sons pour sirènes - Google Patents

Amplificateur de sons pour sirènes

Info

Publication number
FR21135E
FR21135E FR21135A FR21135DA FR21135E FR 21135 E FR21135 E FR 21135E FR 21135 A FR21135 A FR 21135A FR 21135D A FR21135D A FR 21135DA FR 21135 E FR21135 E FR 21135E
Authority
FR
France
Prior art keywords
sirens
sound amplifier
amplifier
sound
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
FR21135A
Other languages
English (en)
Inventor
Louis Chollet
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 FR21135E publication Critical patent/FR21135E/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
    • G10K7/00—Sirens

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
FR21135A 1918-12-12 1918-12-12 Amplificateur de sons pour sirènes Expired FR21135E (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR21135T 1918-12-12

Publications (1)

Publication Number Publication Date
FR21135E true FR21135E (fr) 1920-05-20

Family

ID=8660190

Family Applications (1)

Application Number Title Priority Date Filing Date
FR21135A Expired FR21135E (fr) 1918-12-12 1918-12-12 Amplificateur de sons pour sirènes

Country Status (1)

Country Link
FR (1) FR21135E (fr)

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