Man Attempts to Trademark Ganja with US Patent Office

On April 1, the U.S. patent office announced a new trademark: "Processed plant matter for medicinal purposes, namely medical marijuana." The category was killed three months later when the Wall Street Journal asked about it, but in the meantime ganjapreneurs nationwide filed some very interesting pot trademarks.

Source:
http://blogs.westword.com/latestword/2010/08/marijuana_entrepreneur_tries_to_trademark_the_word_ganja_with_us_copyright_office.php