With the assistance of his friend Carlos Glidden, Sholes invented a numbering machine, which Glidden later suggested should be converted to a lettering machine.

 
  • 他的助手和朋友是卡洛斯.;格莱顿,他发明了多种打字机,并提出了转换字体(也就是后来打字机的大小写)的想法,并为此制作了大约30多种打字机。
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