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Publication of FR337229ApublicationCriticalpatent/FR337229A/en
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
G11B3/44—Styli, e.g. sapphire, diamond
G11B3/46—Constructions or forms ; Dispositions or mountings, e.g. attachment of point to shank
FR337229D1903-12-011903-12-01
Improvements to the membranes of graphophones and other instruments for the reproduction of voice and sounds
ExpiredFR337229A
(en)