By Victor Trammell Photo credits: PBS/YouTube On April 18, 1922, Jack Johnson, the first Black heavyweight boxing champion, innovated a wrench (US patent #1,413,121). However, his wrench patent was not the first. The initial wrench was patented in 1835 by Solymon Merrick of Springfield, Massachusetts. Around 1858, a Baltimore mechanic named Charles Moncky devised the […]
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