The U.S. patent office rejected two patent claims by video recording technology company TiVo in a battle with Dish Network and EchoStar over digital video recorders.
TiVo said it would press on with its legal fight but its shares fell 5.5 percent on Tuesday to close at $7.70.
It has accused EchoStar, maker of digital set-top boxes and spun off by pay-television provider Dish, of infringing technology used in TiVo's "Time Warp" software, which allows users to record one television program while watching another.
