Dahon uses that style of frame in their "MU" line. As I said in another thread, chances are, that frame was originally designed by an independent agency, and adopted by Dahon and other bike manufacturers. That frame design is so ubiquitous, it's not even funny. Even Citizenbike used it on their folders a few years back. So we can safely assume that Dahon does not have a claim that this frame is their exclusive intellectual property.
Originally Posted by
bikebuddha
Overlaying and resizing them they're similar but not identical. There's a limited number of ways to make a folding bike so some similarity is going to happen.