Microsoft Lawsuit
In 1993, Microsoft released MS-DOS 6.0, which included a disk compression program called DoubleSpace. Microsoft had previously been in discussions with Stac to license its compression technology, and had discussions with Stac engineers and examined Stac's code as part of the due diligence process. Stac, in an effort led by attorney Morgan Chu, sued Microsoft for infringement of two of its data compression patents, and won; in 1994, a California jury ruled the infringement by Microsoft was not willful, but awarded Stac $120 million in compensatory damages, coming to about $5.50 per copy of MS-DOS 6.0 that had been sold. The jury also agreed with a Microsoft counterclaim that Stac had misappropriated the Microsoft trade secret of a pre-loading feature that was included in Stacker 3.1, and simultaneously awarded Microsoft $13.6 million on the counterclaim.
While Microsoft prepared an appeal, Stac obtained a preliminary injunction from the court stopping the sales of all MS-DOS products that included DoubleSpace; by this time Microsoft had already started shipping an "upgrade" of MS-DOS to its OEM customers that removed DoubleSpace. By the end of 1994, Microsoft and Stac settled all pending litigation by agreeing that Microsoft would make a $39.9 million investment in Stac Electronics, and additionally pay Stac about $43 million in royalties on their patents.
Read more about this topic: Stac Electronics