Changes

'''Assignor estoppel''' is the patent law doctrine that an assignor of a patent is estopped, or barred, from later contesting the validity of the patent.  The logic behind this doctrine is that by assigning the patent, the patent-holder accepted its validity, and cannot contradict himself on that point later.

'''Assignor estoppel''' is the patent law doctrine that an assignor of a patent is estopped, or barred, from later contesting the validity of the patent.  The logic behind this judge-made doctrine is that by assigning the patent, the patent-holder accepted its validity, and cannot contradict himself on that point later.

The [[America Invents Act]] abrogated this doctrine for ''[[inter partes]]'' proceedings,<ref>https://www.patentspostgrant.com/equitable-defenses-ptab/?utm_source=Mondaq&utm_medium=syndication&utm_campaign=View-Original</ref> however, which further undermines the validity of patents like much of what the AIA has done.

The [[America Invents Act]] abrogated this doctrine for ''inter partes'' proceedings,<ref>https://www.patentspostgrant.com/equitable-defenses-ptab/?utm_source=Mondaq&utm_medium=syndication&utm_campaign=View-Original</ref> however, which further undermines the validity of patents like much of what the AIA has done.

== References ==

== References ==

<references/>

<references/>

[[category:Patent Law]]

[[category:Patent Law]]