Jack Johnson (1878 – 1946) – Wrench
Jack Johnson was a professional boxer born in Galveston, Texas, in 1878. In 1908, he became the first African American World Heavyweight Champion after defeating Tommy Burns in Australia. However, Johnson lived in the United States when black men were not allowed by law to openly date white women. He was later charged with violating the Mann Act for transporting his white girlfriend, Lucille Cameron, across state lines for “immoral purposes” and sentenced to one year in prison.
During his time in prison, Johnson invented a wrench that could loosen and tighten fasteners, and he was granted a patent for it in 1922. Although not his primary claim to fame, Johnson’s invention of the wrench was significant and contributed to the development of modern tools.
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