It has been said that even the actors’ underwear was Weylan-Yutani branded, via rubber stamp.
I can find no evidence of this in Ripley’s famous underwear scene, however, just visible on Kane’s undergarment in the med bay is this red text:
See it? I think I can just make out a few capital letters in “WEYLAN-YUTANI” :
However, if I’m reading that correctly, that would be upside-down when Kane is standing up.