Free trailer · US 4,063,220

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U.S. PATENT · December 13, 19774,063,220

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Now showingMultipoint Data Communication System with Collision DetectionRobert M. Metcalfe · David R. Boggs · Charles P. Thacker

GRANTED
DECEMBER 13 1977

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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.