http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PT...
United States Patent: 6630507 United States Patent 6,630,507 Hampson , et al. October 7, 2003 **Please see images for: ( Certificate of Correction ) ** Cannabinoids as antioxidants and neuroprotectants
But according to the patent, toking for fun is OK, ju...