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• 07:34, 27 July 2023 ChrisVG talk contribs created page Patent for A system of circular electric rheostat with a plate and graduated resistance for special application to light distribution mechanisms in theaters., Clemancon, 1922 (Q31813) (wbeditentity-create:2|en: Patent for A system of circular electric rheostat with a plate and graduated resistance for special application to light distribution mechanisms in theaters.)