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Free trailer · US 223,898

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U.S. PATENT · January 27, 1880223,898
↖ this is where it all started
Now showingElectric LampThomas A. Edison
GRANTED
JANUARY 27 1880

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Drawings come straight from the public USPTO record. This trailer is a free preview; the film is where we explain what your invention does, claim by claim, in plain English.