I'm pretty sure that motor mounts meet the "simple and obvious" exception to a patent. It is just a bent piece of steel with a rubber or poly isolator. People have been making them for at least 100 years. I'd be very surprised if the patent office granted Schumacher patents on any of his designs. I'm sure his business name is copyrighted but I wouldn't want to try and steal his name or counterfeit his packaging like the Chinese do.

If I decided to make swap brackets I'd sell them as AR Engr products. I'd start with a clean sheet of paper and design the bracket from the ground up without copying anything that Schumacher designed. If he sued me I'd stop making the brackets. The Mopar market isn't big enough to justify a lawsuit. Patent attorneys aren't going to get excited over winning a few thousand dollars in damages.