I've seen this brought up before.. I find it unlikely that arctos can claim patent rights to the principles involved in building something like this. At most they could only patent the entire projector design(and have it actually be enforceable), which means unless you made a carbon copy of the entire projector, your relatively safe from legal action, regardless of what they might try to tell you otherwise.. Everything I can see about the setup, as far as techniques for beam shaping, would in no way be any challenge whatsoever to demonstrate prior precedent before arctos was even a company.
It's sort of akin to trying to patent the concept of using punctuation.. Sure you could try and do it, and who knows, it might slip through the cracks and you might even actually get issued a patent... but good luck collecting anything on infringements.. And any patent that's unenforceable, is pointless.