Suing's easy. It's the "winning" that trips folks up. Such is the case with Rambus, who has been relying oh-so-heavily on the so-called trio of Barth patents to actively pursue just about every technology company on the planet. For those unaware, Rambus has christened itself as a "technology licensing company," but with the last of three patents used to win infringement suits against NVIDIA and HP being declared invalid, it's probably scrambling for new tactics. According to a Reuters report, an appeals board at