Edison's electric pen was designed for printing documents. But it's still used today for tattooing
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Tattoo uploaded by Ink or Dye Studio • His and Hers, King and
5 Unknown Inventions from Thomas Edison that Changed the World
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Thomas Edison - IEEE Spectrum
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Did You Know? Edison Coined the Term “Bug” - IEEE Spectrum
Mr Zerox robot Science Museum Group Collection, mister robots
11 Best Thomas Edison Inventions