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CIE GENERALE DES TAXIS TRANSPO
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CIE GENERALE DES TAXIS TRANSPO
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Application filed by CIE GENERALE DES TAXIS TRANSPOfiledCriticalCIE GENERALE DES TAXIS TRANSPO
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Publication of FR546383ApublicationCriticalpatent/FR546383A/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
G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
G10K11/18—Methods or devices for transmitting, conducting or directing sound
G10K11/22—Methods or devices for transmitting, conducting or directing sound for conducting sound through hollow pipes, e.g. speaking tubes
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FR546383D1922-01-261922-01-26Dispositif acoustique pour voitures automobiles
ExpiredFR546383A
(fr)