Canada's Supreme Court strips Viagra patent from Pfizer
(Reuters) - Canada's Supreme Court struck down the patent on global pharmaceuticals giant Pfizer Inc's Viagra erectile dysfunction drug on Thursday and opened the door to generic competition.
David Ljunggren
OTTAWA
Thu Nov 8, 2012 2:13pm EST
link-
http://www.reuters.com/article/2012/11/08/us-viagra-idUSBRE8A70XG20121108