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G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
FR391714D1907-09-031907-09-03
Gramophonic or phonographic device for reproducing duets, trios, etc., and singing with orchestral accompaniment
ExpiredFR391714A
(en)