Horny Goat Weed Deflates Pfizer's Viagra Patent

By Jesse Greenspan (February 16, 2010, 7:17 PM EST) -- A panel of judges at the U.S. Patent and Trademark Office has affirmed the rejection of one claim of Pfizer Inc.'s Viagra patent, saying it was anticipated by oral administration of the Chinese herb yin yang huo, otherwise known as horny goat weed....

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