There's still a penalty for non-willful infringement; if nothing else, the inventor can request an injunction that shuts down your whole production line. That'

There's still a penalty for non-willful infringement; if nothing else, the inventor can request an injunction that shuts down your whole production line. That's the scary thing about patents... unless you have comprehensive knowledge of every patent in your field of endeavor, they are financial time bombs. If the plaintiff can show that you did know about the patent and infringe it willfully, the damages are tripled.