it is probably a homebuilt design that never went mainstream. when part 103 was introduced in the early 80s a lot of builders made stuff like this to fly....some people who had no business designing and building did. but that is part of the charm of UL ac...no inspection necessary ( tho you are a fool if you dont have someone check yor work ). some companies took off...like cgs hawk, challenger, fisher, minimax, etc. but i know guys who drafted up j3 look alikes...and built them from scratch. think this is an example of just that.