Justices uphold a narrow version of patent assignor estoppel
SCOTUSBlog
JULY 1, 2021
The lower courts blocked Minerva from asserting invalidity because Minerva’s founder had filed the original patent applications and then sold the patent rights, which eventually ended up with Hologic. The lower courts ruled that the founder’s original assignment of patent rights prevented, or “estopped,” Minerva from contesting validity.
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