American inventor Josephine Cochran patented the first practical hand powered dishwasher, Via Wikipedia Josephine Cochran was the inventor of the first commercially successful hand-powered dishwasher which was constructed together with mechanic George Butters. …Josephine designed the first model of her dishwasher in the shed behind her house located in Shelbyville, Illinois. George Butters was a mechanic who assisted her in the construction of t…
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