If you put them in a computer, TattleTech will tell you the manufacturer and product name. It isn't always helpful information, but is often a good start for searching old magazines on archive.org.
I can't remember the name of the company that made them - one of them is a graphics card and IIRC the other one is video capture. Note though that the one that's graphics has really weird resolutions because it's designed for broadcast graphics, not desktop use. I nearly picked a pair of them up but sanity prevailed because they're not very useful.