Take a look: http://www.trademarkia.com/
(Or if you want the try through the official USPO website: go to http://www.uspto.gov/trademarks/index.jsp, click on 'search marks', then 'Basis Work Mark Search (New User)'. Then search for 'Saint William Brewery'.)
Another step to set everything up! Making it more official, and protecting all the hard work we put into this brewery!