Found this and more while i was surfing. Meant to be the original Patents for some Transformers.
Best way to find more is to search "google patents" then use "Combined Reconfigurable Toy" as a search. I know Megs is there, ironhide, perceptor and more. I found this quite interesting.
Just had another good look and i reccon if you look hard enough you could find heaps (maybe all) the G1 stuff.