Coincidence.
Also, not sure if you concept would even work. I’m not a bike designer by any means, but looks like the bend of the sections is opposite to what it should be to be under tension so your would just collapse on itself.
I don’t think someone would copy a concept that doesn’t work, but perhaps they were inspired and and understood the physics needed to make it possible. It’s also a pretty obvious idea to get rid of the seat tube, so I don’t think you would be the first to try it.
R