Invalid Articles on Engadget

February 7, 2013 at 7:58PM

Judge invalidates 13 Motorola patent claims against Microsoft

April 25, 2012 at 11:14PM

European Patent Office invalidates IPCom 3G patent, gives good news to Nokia and HTC

January 30, 2012 at 7:46AM

US government rules three Barth patents invalid, sends Rambus scrambling

June 8, 2010 at 8:42PM

USPTO rules against TiVo's "Time Warp" patent, but the fight vs. DISH rages on, again