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A63J—DEVICES FOR THEATRES, CIRCUSES, OR THE LIKE; CONJURING APPLIANCES OR THE LIKE
A63J5/00—Auxiliaries for producing special effects on stages, or in circuses or arenas
A63J5/02—Arrangements for making stage effects; Auxiliary stage appliances
A63J5/04—Arrangements for making sound-effects
FR415090D1909-04-281910-04-21Perfectionnements dans les appareils pour produire divers effets sonores pour des applications théatrales et autres
ExpiredFR415090A
(fr)