that's why one i'm about to tell you is so ironic. >> the irony is that the federal government has patented one of the important chemicals in the plant. >> the government of the united states has a patent on a substance for medicinal purposes at the same time they say it has no medicinal purposes? >> exactly. >> researcher dr. michael bostwick is talking about patent number 6630507, held by the u.s. depth of health and human services for the exclusive use of cannabinoids for the use of certain treatments. >> i was stunned and it felt like a dog in the manger that the federal government is sitting on this wonderful thing, and not letting anybody else do anything with it. >> when we went to the government to ask about it, none of the agencies involved would