What are the consequences of failing to record a patent assignment with the USPTO?

This page is an FAQ based on guidance from the Manual of Patent Examining Procedure. It is provided as guidance, with links to the ground truth sources. This is information only: it is not legal advice.

Failing to record a patent assignment with the USPTO can have several important consequences:

• Lack of legal notice: As stated in MPEP 302, ‘An assignment recorded in the Office is regarded as notice to the world of the ownership of the patent.’ Without recording, third parties may not have legal notice of the assignment.
• Potential validity issues: In some cases, failure to record an assignment could affect the validity of subsequent actions taken by the assignee.
• Difficulties in enforcement: Unrecorded assignments may complicate patent enforcement efforts, as the assignee’s standing to sue could be challenged.
• Problems in future transactions: Lack of a clear chain of title can cause issues in future sales, licenses, or other transactions involving the patent.

While recording is not mandatory, it is highly recommended to protect the assignee’s rights and ensure a clear chain of title for the patent.

For more information on legal notice, visit: legal notice.

For more information on patent assignment, visit: patent assignment.