Dish Network Corp. and Echostar Corp. scored a rare legal victory after the U.S. Patent and Trademark Office ruled that TiVo Inc.'s patent claims over its "time-warp" digital video recorder technology were invalid.
WSJ.com: US Business, Wall Street Journal: Business
Tue, 06/08/2010 - 4:07pm
Dish Network Corp. and Echostar Corp. scored a rare legal victory after the U.S. Patent and Trademark Office ruled that TiVo Inc.'s patent claims over its "time-warp" digital video recorder technology were invalid.