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George W. Cannon : ウィキペディア英語版 | George W. Cannon George W. Cannon was an American inventor from New York. He is best known for the invention of the mechanical dumbwaiter. Cannon first filed for the patent of a brake system (US Patent no. 260776) that could be used for a dumbwaiter on January 6, 1883.〔 Limited Preview, ''Google Books'', accessed October 30, 2012.〕 He later filed for the patent on the mechanical dumbwaiter (US Patent No. 361268) on February 17, 1887.〔 Limited Preview, ''Google Books'', accessed October 30, 2012.〕 He is reported to have generated a vast amount of money from royalties from his dumbwaiter patents until his death in 1897.〔, retrieved October 30, 2012.〕 ==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「George W. Cannon」の詳細全文を読む
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