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Publication of FR771694ApublicationCriticalpatent/FR771694A/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
G11B3/68—Record carriers
G11B3/70—Record carriers characterised by the selection of material or structure; Processes or apparatus specially adapted for manufacturing record carriers
FR771694D1933-07-131933-07-13Procédé pour l'enregistrement des sons sur disques phonographiques et disque pour la mise en oeuvre de ce procédé
ExpiredFR771694A
(fr)
Procédé d'enregistrement magnétique des sons sur des fils, rubans, cylindres ou disques, en acier ou autre matière magnétique, pour reproduire ces enregistrements et les effacer complètement