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Publication of FR583786ApublicationCriticalpatent/FR583786A/fr
G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
G11B3/44—Styli, e.g. sapphire, diamond
G11B3/46—Constructions or forms ; Dispositions or mountings, e.g. attachment of point to shank
FR583786D1924-07-171924-07-17Diaphragme reproducteur amplificateur pour machines parlantes et autres appareils reproducteurs de sons
ExpiredFR583786A
(fr)
Perfectionnements aux cornets, pavillons et autres amplificateurs acoustiques pour récepteurs téléphoniques hauts-parleurs et autres appareils producteurs ou reproducteurs de sons