Two facts I think are relevant to the two facets of the case here:
A - The term 'PAF' that Larry claims to own is derived directly from the stickers on Gibson's early humbuckers, and was already being used at the time referring to those specific Gibson pickups.
B - As
beaubrummels pointed out, DiMarzio's shade of cream was chosen deliberately to imitate uncovered Gibson PAFs which had aged a bit by the time Larry filed his claim.
Kudos to Gibson, using their team of lawyers for the greater good rather than for pushing around smaller builders.
Of course it isn't pure altruism - trying to salvage their reputation after being known as the big bad corporate bully.
Still a good thing in my book.