Heavyweight boxing champion Jack Johnson had a bevy of talents. He was an inventor; inventing the wrench. He was also an astute business man. He owned and operated Club Deluxe in Harlem, located at 142nd Street and Lenox Avenue. This club later became the Cotton Club. In addition to all of this, Jack Johnson was also a musician. He played the cello and the bass.
In April 1922, Jack Johnson received a patent for his invention, the “Johnson Wrench.” His invention fuctioned as a tightener for loosened fastening devices.