i checked Rubik's cube image rights and i'm still confused about the legal protection of Rubik's cube. I know the patent expired and their 3d trademark lost a case in EU.
Does this imply they don't own the exclusive rights to the concept of 3x3x3 cube with rotating sides?
Can I legally manufacture and sell a blank wooden 3x3x3 block that rotates with no pictures/color? (under the assumption that rotating mechanics are different)