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A comment on Patent US5443036 – Method of exercising a cat. Parent comment

Re:Patent US5443036 – Method of exercising a cat by brlewis on Friday October 23, 2015 @08:19AM (#10438098)
It's also worth noting that the burden of proof is on the alleged infringer to convince a court that the patent is invalid. Invalid patents can still cause pain.

https://www.law.cornell.edu/uscode/text/35/282

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Re:Patent US5443036 – Method of exercising a cat by oneJob on Friday October 23, 2015 @09:14AM (#10438335)
Indeed. Attention is given to patent trolls, but not so much (that I'm familiar with anyhow) the incentives around awarding (there are incentives in place to bias the granting of a patent, as opposed to denying one or claw back clauses regarging wrongly granted patents) or voiding patents.
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