As I understand it, invalidating a patent is typically a Pyrrhic victory—you can't recover the money you spent on defense, even after demonstrating the plaintif

As I understand it, invalidating a patent is typically a Pyrrhic victory—you can't recover the money you spent on defense, even after demonstrating the plaintiff's willful abuse of USPTO's negligence. Which means you can't find a lawyer to defend you on contingency, so if your business can't sustain the full cost of the defense, you're just fucked.