The Mouse Systems mouse used on Sun workstations had two LEDs (and matching sensors) of two different colors, and the solid mouse pad had vertical bars of one color ink, and horizontal of the other. You can take it from there.
Inventor / founder Steve Kirsch used some of the proceeds to fund Frame Technology, which then went on to be sold to Adobe. And then Infoseek (a search-engine also-ran), sold to Disney; and then Abaca (anti-spam), sold to Proofpoint.
Inventor / founder Steve Kirsch used some of the proceeds to fund Frame Technology, which then went on to be sold to Adobe. And then Infoseek (a search-engine also-ran), sold to Disney; and then Abaca (anti-spam), sold to Proofpoint.