Surely this must apply for Trademarks too? It is irelevant that PI and Trademarks are handled differently, if there needs to be a list of PI then there needs to be a list of trademarks as well. And if the list of trademarks ever changes then we both need to agree to this change! The list of registered trademarks changes every day! So according to you the OGL will only ever last as long as the trademark list remains constant?
I think that effectively a trademark is recognized as a valid mark in trade with geographic limitations, potential limitations on the types of commodity associated with the mark, repeated use in commerce, and general public awareness of the trademark (i.e., in the geographic area where the mark can be claimed as a valid trademark, the mark is used in print, on store fronts, in the phone book, on the internet, etc.).
There is more public awareness re: trademarks. However, PI is PI even if I and my buddy Mark have the only copies of the document in the world.
Therein lies the distinction.
Lee
