Frankly, I'm a bit skeptical. I don't see how the Darblet could really enhance the image that much. The best you can do is to reproduce with perfect fidelity whatever was recorded onto the disc.
Once you start changing the resulting image, even if it might look "better" in some cases, you're actually departing from the fidelity of the original image. And it's hard to imagine any algorithm that always improves on perfect fidelity in a consistent manner.
In terms of having received patents, I think that doesn't mean a whole lot. My understanding is that the US Patent Office grants patents to applicants irrespective of how significant/insignificant it may be. Basically, they assume that if there are patent conflicts the parties involved will hash it out in court.
Many years ago, when Windows was fairly new, there was a product that purported to make your Windows machine run faster and it sold for $50 or so. It actually got numerous good reviews and some customers raved about. Then, I think someone decompiled it and found it didn't do anything !
Just my two cents..