Of course, the techniques themselves of inversion, retrograde and retrograde-inversion are not really yours (and you don't claim them to be); you only claim the Inversion Synthesis to be novel as well as the whole approach to "composing."
True, but a significant part of my claim is that the strict harmonic inversion process has been hardly used at all in the last 100+ years, with the Rachmaninoff vs Paganini being the only famous example.
By analogy, I would say that you are largely making music, not creating it. But that does not equal making poor music; that will depend upon the operator.
In general yeah, certainly for my "Piano Sketches" which are based mostly on inversions. With my second "Reflections" album I'm trying a different approach of composing a significant start and end to each piece which is entirely my own work, and then using inversion synthesis to provide ideas to fill the gap.