Free trailer · US 3,541,541

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U.S. PATENT · November 17, 19703,541,541

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Now showingX-Y Position Indicator for a Display SystemDouglas C. Engelbart

GRANTED
NOVEMBER 17 1970

PATENTFILM

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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.