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UL codes were extensively used in the 90's to identify who made a particular CRT-type Computer Monitor, particularly when looking for service info, or when the monitor wasn't up to FCC Part 15 regs. I had one given to me that would broadcast a nice herringbone pattern on a Sylvania Superset 25 feet way, and connected to cable. Got a new one out of that - FCC said fix it, or replace. Manufacturer's rep out of New York (SamFoo of Taiwan) sent me a letter and purchase order to get a replacement at CompUSA. The UL code led me to a phone number, and things rolled quickly after a demo at the FCC field office.
ET-D magazine (Electronic Technician-Dealer, later Electronic Servicing) had a UL database article in one issue, with a majority of VCR manufacturers listed, so you could really find out who made the XAM or Harley-Davidson VCR you had to service. I'll see if I can find it. Some of the TV repair databases (RepairWorld and others) had a web-driven lookup by UL or FCC codes.
EIA (formerly RETMA) codes were published in certain Photofact Sets in the 50's and 60's. They are largely done away with now, as Electronic Industries in America almost seems like an oxymoron. I can name about 20 US manufacturers with factories here in the US, but all of the biggies have fabs outside the US for the most part.
Cheers,
__________________
Brian
USN RET 22YRS (Avionics/Cal)
CET-Consumer Repair and Avionics ('88)
"Capacitor Cosmetologist since '79"
When fuses go to work, they quit!
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