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L BLERIOT DES ETS
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L BLERIOT DES ETS
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Application grantedgrantedCritical
Publication of FR459570ApublicationCriticalpatent/FR459570A/fr
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
G10K7/02—Sirens in which the sound-producing member is rotated manually or by a motor
G10K7/04—Sirens in which the sound-producing member is rotated manually or by a motor by an electric motor
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Physics & Mathematics
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Engineering & Computer Science
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Acoustics & Sound
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FR459570D1912-07-121913-06-23Perfectionnements apportés aux sirènes et appareils analogues
ExpiredFR459570A
(fr)