Canada's High Court Kills Viagra Patent In Pfizer-Teva Row

By Jeff Overley (November 8, 2012, 12:55 PM EST) -- The Supreme Court of Canada on Thursday voided Pfizer Inc.'s patent for erectile dysfunction treatment Viagra, finding the drugmaker didn't disclose enough about how the medicine works to deserve exclusivity and clearing the way for generic competition from Teva Pharmaceutical Industries Ltd....

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