Not sure... looks (or at least, reads) like they could just be a distributor (the word "manufacturer" (in referring to themselves) seems scarce on their site).
Dana (Spicer) is (or at least, was) the source manufacturer of these joints (I've seen reports some Mcquay-Norris (<sp?) joints are the characteristic gold w/blue boots also). Now I'm wondering if Dana may have sold off the suspension (ball joint) part of their company, I don't see any such products on the Spicer site anymore, but obviously they're still around (hopefully of the same quality too, certainly my Raybestos Pro-Grade joints were, I bought them 2008? I think? They've already far outlasted the two Moog ones (3 in total) I had in there before the Raybestos).
Cool link find.

I might have to do a little more research on this.
Also FWIW, Moog is a brand under the Federal-Mogul umbrella.
Edit:
McQuay-Norris is under the Affinia group, so that one makes sense now.
Edit-Again:
Well I'll be dammed...
Sold in 2004.
http://en.wikipedia.org/wiki/Affinia_Group
That's right between when I bought Spicer-branded joints for my Ranger ('02), but could only find the Raybestos ones in '08 for my BII (and maybe is also why I couldn't find EITHER in '05 when I bought those stupid Moogs

)