July 7, 1936: Get a Grip &#151 Phillips Screws Up the Toolbox

Henry F. Phillips receives patents for a new kind of screw and the new screwdriver needed to make it work. It changes the worlds of mass production and machine repair, not to mention your home toolbox.

Source: http://www.wired.com/thisdayintech/2011/07/0707phillips-screw-patent/

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