Hello
I've been at this a long time. For me the first names I heard in treestands was Loc-on for fixed stands, Baker was the first climbing stand I heard of and the Lawson wedge(a hinged stand for tree crotchs).
These were back in the 70's and there were probably a few more that I never heard of. If you can get your hands on old magazines, look at the ads and the time frame or contact some of the older guys that are still heavily into bowhunting through magazines or clubs.
Happy Hunting
Dan