Booker LAB

The inventor of the Leslie Cabinet was
Donald James Leslie (April 13, 1911 – September 2, 2004) He was an American inventor best known for the Leslie speaker and its distinctive effect commonly used with the Hammond organ which helped popularize electronic instruments.

Donald Leslie WIKI - https://en.wikipedia.org/wiki/Donald_Leslie

Leslie Cabinet WIKI - https://en.wikipedia.org/wiki/Leslie_speaker