UL (Underwriters Laboratories) code meanings

[rpm1200]

Hello,

I posted some info this morning in the classifieds about a no-name TV and wondering who was the OEM (original equipment manufacturer), and it got me thinking about the UL tags most TVs have... I know that in the 90s or so, UL started identifying manufacturers via a seven-digit identifier, and they started printing that identifier on the tags near the UL logo. For example, I just grabbed my Motorola phone charger and it has "E199967" next to the UL logo. By going to http://database.ul.com/cgi-bin/XYV/t...RAME/index.htm and entering the identifier code in the UL File Number field, I can determine that "POWER SYSTEMS TECHNOLOGIES FAR EAST LTD" was the OEM for my phone charger.

My question is, can the four-digit codes on older (pre-90s) UL tags be correlated to the OEM in any way, or do they have some other meaning? The only code on my mystery TV's UL label is 628E. Doing some googling on that returns references to Samsung TVs but maybe that's just a coincidence. Samsung projection TV recall Curtis Mathes V-chip issue - appears to be Samsung OEM I took a look at some of my other gear, my 1991 Sony KV-20EXR10 only has a 4-digit code, a late 90s Sony VCR has a different 4-digit code and of course my 70s-80s gear only has the 4 digit codes as well.

If there is a manufacturer identification in that 4-digit code, is there a database out there to look it up in? This would be a great resource for identifying private-label and no-name gear.

TY, RPM