Shares of TiVo Inc. rose about 50 percent Thursday in the wake of an appeals court ruling that Dish Network Corp. and EchoStar Corp. are infringing its patents.

Alviso-based TiVo (NASDAQ:TIVO) was at $14.98 in midday trading after rising as high as $16.39 during the day's trading.

The U.S. Court of Appeals for the Federal Circuit on Thursday upheld a finding by a lower court that Dish and EchoStar must stop selling digital video-recording products.

The two companies said earlier they avoided infringement by changing their technology slightly, but TiVo complained that the changes the companies made were not enough.

In 2006 TiVo won a first ruling of patent infringement by Dish.