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Sonora Phonograph Corp
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Sonora Phonograph Corp
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Application filed by Sonora Phonograph CorpfiledCriticalSonora Phonograph Corp
Application grantedgrantedCritical
Publication of FR481600ApublicationCriticalpatent/FR481600A/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
G10K13/00—Cones, diaphragms, or the like, for emitting or receiving sound in general
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FR481600D1916-04-271916-04-27Dispositif reproducteur et amplificateur de sons, pour phonographes
ExpiredFR481600A
(fr)
Einrichtung zur phonographischen Aufnahme und WiedEinrichtung zur phonographischen Aufnahme und Wiedergabe telephonisch übermittelter Gespräche. ergabe telephonisch übermittelter Gespräche.