Thomas Edison had a tatoo of 5 dots (like on a dice) on his left forearm

Interestingly, Edison was credited for inventing the basic tattoo machine. In 1876, he patented the Stencil-Pens, an engraving device that many years later was modified by Samuel O’Reilly to make the world’s first tattoo machine.
Though it would’ve been a neat thing, there was simply no evidence that Edison used his invention to give himself a tattoo.

