So I did some digging and found CATEK's patent. It's U.S. Patent #6,189,911, filed Jan. 9, 1998. This means it expired almost exactly two years ago. Has any new brands popped up making CATEK style bindings? The kingpin + set screw design seems to be the best way to go in terms of adjustability and rigidity.
I also cannot seem to find Bomber's patent for whatever reason. Does anyone have anything on it?