FR553640A - Perfectionnement apporté à la fabrication de disques bruts, destinés à recevoir des impressions pour la reproduction de sons
- Google Patents
Perfectionnement apporté à la fabrication de disques bruts, destinés à recevoir des impressions pour la reproduction de sons
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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
FR553640D1922-07-041922-07-04Perfectionnement apporté à la fabrication de disques bruts, destinés à recevoir des impressions pour la reproduction de sons
ExpiredFR553640A
(fr)
Procédé de fabrication de disques et de planches recevant des impressions, plus spécialement de disques pour gramophones et de planches d'impression