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
![The household wrench was invented by boxing heavyweight champion Jack Johnson in 1922. #funfact #didyouknow - Franklin Billiard Company The household wrench was invented by boxing heavyweight champion Jack Johnson in 1922. #funfact #didyouknow - Franklin Billiard Company](https://d1qkyo3pi1c9bx.cloudfront.net/2/DEF6F2BF-162B-4D38-8E0F-88F53DBEE717/4d3c8f81-98b0-4b09-919c-1f93817d6178.jpg)
The household wrench was invented by boxing heavyweight champion Jack Johnson in 1922. #funfact #didyouknow - Franklin Billiard Company
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
![Capital Plumbing on X: "Did You Know? 🤔 Solymon Merrick patented the first wrench in 1835. Another patent was granted to Daniel C. Stillson, a steamboat fireman, for a wrench in 1870. Capital Plumbing on X: "Did You Know? 🤔 Solymon Merrick patented the first wrench in 1835. Another patent was granted to Daniel C. Stillson, a steamboat fireman, for a wrench in 1870.](https://pbs.twimg.com/media/EdJD3LbVAAAzRow.jpg)
Capital Plumbing on X: "Did You Know? 🤔 Solymon Merrick patented the first wrench in 1835. Another patent was granted to Daniel C. Stillson, a steamboat fireman, for a wrench in 1870.
Manatee Village Historical Park - We're throwing a wrench your way! The wrench as we know it was a refinement on the English coach wrenches of the 1700s. | Facebook
![DID MONKEYS INVENT THE MONKEY WRENCH? | Book by Vince Staten | Official Publisher Page | Simon & Schuster DID MONKEYS INVENT THE MONKEY WRENCH? | Book by Vince Staten | Official Publisher Page | Simon & Schuster](https://d28hgpri8am2if.cloudfront.net/book_images/onix/cvr9780684832746/did-monkeys-invent-the-monkey-wrench-9780684832746.jpg)