Dime store/gumball machine rubber monsters?

[Hepcat]

These are probably fairly recent, but seem appropriate for this thread.



I bought them from an eBay seller who I don't think had a clue what they are. I don't even remember what they called them. I call them Rubber Chompers for lack of a better name. The bottoms are marked "STL", or at least I think that's what it's supposed to be- the "S" extends over the "L" to form a "T" in a stylized logo. Also marked "COPYRIGHT" and below that "Made In China". I think they're cool looking, and they were inexpensive, so I bought them. If set on a flat surface and pushed down they take off on their wheels when let go as the mouth gradually opens. Pretty cool. Anyone know anything about them?

So can anyone identify the above?