There's a lot of companies that produce them, and at least a few big brand names that are making their own and for sure not just relabeling something else.
Unless I’m mistaken, and I probably am, the patents on blueray should have expired by now. Software side might be covered under copyright right though. Not sure if software can be copyrighted though tbh.
Not sure where you get this, but the standard is now ruled by Blu-ray Disk Association. There's no mention about patent. I've looked on the Wikipedia page and the only mention about royalty is about the video codec.