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Application filed by Orlando Elwood KellumfiledCriticalOrlando Elwood Kellum
Application grantedgrantedCritical
Publication of AT91079BpublicationCriticalpatent/AT91079B/en
AT91079D1915-04-281920-07-05
Method and device for producing synchronous cinematographic film and phonographic plates, rollers or the like.
AT91079B
(en)