Stefan, that is the most valid arguement EVER. It is entirely possible to make something which is legally dissimilar. Verdes going after the YongJun 5,6,7 etc. would be understandable. Those ARE blatent copies. However, the GuHong Is disimilar in many ways, Which I will point out to the best of my ablility
1. The corners (Of the GuHong) have a triangular bowl shape rather than a shape resembling a quarter of a sphere (Of V-3). They also do not have a cut out 'track' in the cube portion
2. The Edges are completely lacking of the V cube mechanism's 'track' lip. They also do not have a base in the shape of a standing quarter circle, rather they branch off in to a moon-like shape.
3. The centers are entirely dissimilar. Rather than having the protrusion which the v mech is known for, they are cubical in appearrance. The stalk itself is also very dissimilar, Haveing a diameter close to that of the screw.
I know this all sounds stupid, and there is much more detail than that, but this is what I have to say. I mean no disrespect to Verdes or Pantazis, but I believe these cubes to be different enough to not infringe on the patent...however, I am no lawyer. And thus this is only an opinion