United States Patent US6113940:
Cannabinoid patch and method for cannabis transdermal delivery.

We  found this patent application in the U.S for a cannabis patch similar to the nicotine patch which has been commercially available for years. Several companies (and even the U.S government – see our previous article “U.S Government Patents Cannabis“) have recently started to take notice of the medicinal properties of cannabis and have started a rush to patent any possible application of this wonderful natural herb. Part of this trend could be linked to the legalization movement which has successfully highlighted several medical advantages to cannabis over traditional pharmaceuticals, particularly the lack of significant negative side-effects when treating serious illness.

Here are the links to both the Patent outline and the Application in .pdf form