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C E M A CONST ELECTRO MECANIQU
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C E M A CONST ELECTRO MECANIQU
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Publication of FR760473ApublicationCriticalpatent/FR760473A/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
G10K11/002—Devices for damping, suppressing, obstructing or conducting sound in acoustic devices
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FR760473D1932-11-281932-11-28Appareil indicateur d'appel sonore pour automobile
ExpiredFR760473A
(fr)