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Publication of FR441737ApublicationCriticalpatent/FR441737A/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
FR441737D1911-03-281912-03-26Perfectionnements apportés à la construction des machines parlantes pour la reproduction de disques enregistrés
ExpiredFR441737A
(fr)