The world's first African American heavyweight champion patented a wrench (U.S.patent#1,413,121) on April the 18th, 1922.
Jack Johnson, defeated Canadian Tommy Burns on December 26, 1908, in the World Boxing Championship held in Sydney. This initiated the quest to find a "Great White Hope" to defeat Johnson. James Jeffries, a leading white fighter, came out of retirement to answer the challenge. Jack Johnson won their fight on July 4, 1910.