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James Densmore
James Densmore was a business associate of Christopher Sholes, who along with Carlos Glidden and Samuel W. Soule helped contribute to inventing one of the first practical typewriters at a machine shop located in Milwaukee, Wisconsin.〔(Invention of the Typewriter ), Wisconsin Historical Marker'', Retrieved May 11, 2008.〕
It was believed that Densmore had suggested splitting up commonly used letter combinations in order to solve a jamming problem, but called in question.〔Koichi and Motoko Yasuoka: (On the Prehistory of QWERTY ), ZINBUN, No.42 (March 2011), pp.161-174.〕 This concept was later refined by Sholes and became known as the QWERTY key layout.
== Notes ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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