Accoring to Michael Noonan, director of investor relations at Forgent "If a company uses JPEG, they are using our patents." More than 35 companies are currently paying Forgent over $100 million in licensing revenue for products employing JPEG compression. Current licensees include Sony, Adobe, and Macromedia. Companies that have been sued include Apple, Dell, Kodak, HP, IBM, and Xerox Corp. In 2002, Forgent said it planned to pursue licensing agreements from any company that sells products that compress or store JPEG files. More here.