It's claim to be a proto-type would be false. Utah Scientific's first machine had a configuration much like a Tucker Snow Cat with 4 tracks, but instead of turning both sets, it only turned the front set. Many people mistake this model for being University of Utah, Logan EXP#1(Actually the number 1 was written out ONE on the brass nameplate which I removed shortly before the machine was scrapped out. I gave it to Bill and Mary Guthrie, who had it framed.
It is most likely that Tucker Snow Cat, which had already been producing Snow Cats for 30 years, sued for patent infringment. Thus the 2nd model was 2 track instead of 4 track. They made quite a few of these.