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Update: Jack Johnson and The Wrench - The Black History Channel
Daily Black History Facts - April 18, 1922: Jack Johnson received a patent for his improvement to the monkey wrench. While Johnson was in Leavenworth Federal Prison in Kansas, he found a
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Did Jack Johnson Invent the Monkey Wrench? | Snopes.com
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Monkey wrench' dates to 1800s – not name given to boxer Jack Johnson's invention - Africa Check
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The forgotten story of 'America's most famous tool' - The Boston Globe
The forgotten story of 'America's most famous tool' - The Boston Globe
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Did Jack Johnson Invent the Monkey Wrench? | Snopes.com
LaUnique African AmericanBookstore & Cultural Arts Center - 🍂🍁🍂🍁🍂🍂 Repost from @blackhistoryunlocked • Jack Johnson, the first Black heavyweight boxing champion, patented a wrench (U.S. patent #1,413,121) on April 18, 1922 His