We’ve been talking about plant patents a bit recently, and the coming changes to the patent system. In light of that discussion, it’s helpful to realize that plant patents don’t enforce themselves. The holder of the patent must take enforment action if they discover a violation. Conard-Pyle recently did exactly that, forcing a New Jersey nursery to stop growing Knock Out® roses without a license. It ‘s not the first time Conard-Pyle has taken action to protect its intellectual property.