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Besides inventing the incandescent light bulb are there other inventions developed by Edison?

April 26, 2017Edison incandescent inventing inventions light bulb

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Besides inventing the incandescent light bulb are there other inventions developed by Edison?

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At one time, the Edison group(think tank) held over 2000 patents for items developed under Edison’s guidance. Several well known Edison invented devices: Telegraph, movie projector, phonograph player(which now looks like a CD player).