• CBS, Playboy, CocaCola, ABC, Camel Cigarettes, Windows
• US Sprint/Sprint^, Travelers, Apple, Nike, AT&T, Chrysler
• Warner Brothers, White-Westinghouse, Chase, Intel, Pizza Hut, McDonalds
• Xerox, Adobe, IBM, General Electric, Internet Explorer, Bell Laboratories^
• United Airlines, Shell, Adidas, NBC, Pepsi, Compaq

Edit^

• Credit to atomicbocks for being there first
• Small note here; while bell labs had retained the logo, BellSouth and providers in Canada also used the logo.

Nah, uh, uh. You didn’t say the magic word!

So for any one else wondering, I went looking for receipts and it seems to check out. Source material claims to be affiliated with the University of Oxford. The database is difficult to navigate, but i was able to find this link to the 4.08.16 english text.

https://etcsl.orinst.ox.ac.uk/cgi-bin/etcsl.cgi?text=t.4.08.16&display=Crit&charenc=&lineid=t40816.p1#t40816.p1

Even as someone who is way out of depth, the database is interesting to explore.