The actor was something of a conga nut, it seems, and enlisted the help of Latin jazz percussionist Poncho Sanchez decades ago while developing a new tuning system for conga drums. Though he'd been awarded four patents for various parts of the invention, Brando had difficulty, er, drumming up manufacturer interest before his death in 2004.
But wait, there's more! He had ideas for all kinds of inventions, including what Brando's patent lawyer Kevin Costanza describes as traction-optimizing swimming shoes. "He had these shoes that you can wear in the pool, that would increase friction as you walk on the bottom of the pool to give you a better workout."
Further: when Brando was working on his designs, he didn't want to be referred to as an actor. "He doesn't want to be called an actor, he doesn't want to know he's your favorite actor, he doesn't want to know how much you loved his movies," Costanza told NPR. "He doesn't want to talk about acting or Oscars or any of those kinds of things."
Below, watch Brando on the Edward R. Murrow show, circa 1953, playing the conga drums: