Film speed control for sound motion picture projector

Details Film speed control for sound motion picture projector Film speed control for sound motion picture projector

G - Physics

03

B

318/103, 271/38,

G03B 31/00 (2006.01) G03B 31/02 (2006.01) H02P 5/48 (2006.01) H02P 23/10 (2006.01)

Patent

CA 1028025

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