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UrMomReadsHN
on Jan 5, 2015
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Almost No Patented Discoveries Get Used
Point 4 is known as "Evergreening" and it surely happens. An example I can think of off the top of my head is Lexapro.
toomuchtodo
on Jan 6, 2015
[–]
Pfizer tried to do this in Canada with Viagra, and the Canadian Supreme Court invalidated their patent in return.
http://arstechnica.com/tech-policy/2012/11/pfizer-caught-gam...
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