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Harold Kosoff : ウィキペディア英語版 | Harold Kosoff
Harold Kosoff (November 5, 1930 – March 12, 1995) was an inventor. He is credited with inventing the free piston engine and the battery-powered baby swing. (U.S. Pat. No. 4,448,410 ) Exclusive rights for the battery-powered baby swing were sold to Graco. In addition, Kosoff invented a home air cleaner and chainless bicycle using an arc and pulley system. ==External links==
*(United States Patent 4448410 ), US Patent Office. Accessed 2007-01-04. *(), Canadian Patent Office Issued May 25, 1965 *(), New York Times Article, April 11, 1964
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