Re: Lucky that Atari hadn't patented their design then
Prior art. See US patent: Position Control System Employing Pulse Producing Means Indicative of Magnitude and Direction of Movement," R. A. Koster, Feb. 14, 1967
Prior art. See US patent: Position Control System Employing Pulse Producing Means Indicative of Magnitude and Direction of Movement," R. A. Koster, Feb. 14, 1967