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Publication of DK108943CpublicationCriticalpatent/DK108943C/da
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
DK87862A1961-02-271962-02-24Fremgangsmåde til fremstilling af grammofonplader.
DK108943C
(da)