I see a couple of bikes that fold by depressing the seatpost (not possible on the Mantis, which leaves it relatively big without removing parts), folding the handlepost at 45deg and folding the mainframe 180deg just before the chainwheel. No resemblance? I don't know how to break this to you, but that fold is right out of Dr. Hon's 1981 patent application.

Hey, look! A 2000 year model Dahon Gotham City!