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Inventors
Granville T. Woods
1856–1910
Known as 'Black Edison,' he held over 60 patents including the multiplex telegraph.
📖Biography
Granville T. Woods was an African American inventor who held more than 60 patents. He was self-taught and developed numerous inventions for railways and electrical systems. Thomas Edison twice tried to claim credit for Woods' work but lost both times in court.
Key Achievements
1
Held over 60 patents
2
Invented the multiplex telegraph (Synchronous Multiplex Railway Telegraph)
3
Developed the third-rail system for electric railways
4
Won patent disputes against Thomas Edison
Inventions
Multiplex telegraphThird-rail systemAutomatic air brakeTelephone transmitter
Legacy & Impact
Woods' inventions revolutionized railway communication and safety, and his third-rail system is still used in subway systems worldwide.