Q: Is an origami also used in stents? ¶
A: Yes, and packaging and other engineering applications.
Q: Is an origami in the public domain? ¶
A: Yes, one cannot avoid using the same folding creases or the same arrows to show the direction in which to fold the paper". Therefore, it is legal to redraw the folding instructions of a model of another author even if the redrawn instructions share similarities to the original ones, as long as those similarities are "functional in nature". The redrawn instructions may be published without necessity of any permission from the original author".