pistol-grip portable tool was patented by African american &

Автор: swj swj 04.03.2021

A power drill is a drill that is driven by an utility motor. The invention in the electric drill is paid to Arthur James Arnot in addition to William Blanch Brain associated with Melbourne, Australia who patented the electric drill in 1889. [1] Throughout 1895, the first lightweight handheld drill was developed by brothers Wilhelm & Carl Fein involving Stuttgart, Germany. In 1917 the 1st trigger-switch, pistol-grip portable tool was patented by African american & Decker
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