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In perfecting the design of his machine, Porteous made several revisions on his own and also traded ideas with William Deidrick, Frank Dusy, and Abijah McCall, who invented and held patents on similar scrapers.
His ideas, combined with those of fellow-inventors William Deidrick, Frank Dusy, and Abijah McCall, all of Selma, California led to the Fresno Scraper (1883).