BLACKPAST
Alexander Miles, a Duluth barber, patented an elevator door mechanism in 1887; a flexible belt and levers helped automate the shaft and car doors
Alfred Cralle, a Pittsburgh porter, patented his ice-cream mold and disher in 1897; its thumb-operated scraper let servers dish 40 to 50 plates a minute
Frustrated BJP distorting history to hide black past: Ashok Chavan
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