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Arthur Mackmann, 93, who helped develop the gears in power windows on automobiles in the 1940s, died Friday at Evanston Hospital of heart failure. He owned Franke Gear Works on the North side of Chicago. He was a member of the American Society of Auto Engineers for more than 50 years. He is survived by two sisters. A service will begin at 1 p.m. Tuesday at the Piser Chapel, 9200 N. Skokie Blvd., Skokie.
