Interesting article from Lexis Nexis

http://www.lexisnexis.com/lawschool/.../NegInsCh1.pdf

The above referenced article contains a lot of good information on the nature of 'negotiable instruments' and "payment systems". If you read the article, please pay particular attention to the cover page, as it shows dramatically the use of the Trademark and also shows that a name is registered , obviously via a process.

The article also gives a lot of insight in the footnotes that are contained in it.