Minerva v. Hologic reset the patent doctrine of assignor estoppel for modern transactions and founder disputes.
The Supreme Court preserved the doctrine but narrowed it to situations where the assignor's invalidity position contradicts explicit or implicit representations made in assigning the patent.
For deals, employment, and founder mobility, the decision means assignment documents and later claim changes matter. Estoppel is no longer an automatic all-purpose bar.
The case should be tied to startup and licensing coverage because it affects how patent assignments allocate future litigation leverage.