What information is available in USPTO patent assignment records?

USPTO patent assignment records contain valuable information about the ownership and transfer of patent rights. According to MPEP 301.01, these records include:

• Reel and frame number of the recordation
• Name of the conveying party (assignor)
• Name and address of the receiving party (assignee)
• Patent or application number
• Date of execution
• Date of recordation

The MPEP further states: The actual assignment document will not be viewable through Assignment Search. Only the bibliographic information contained in the recorded cover sheet will be viewable from the Assignment Search database.

This information helps track the chain of title for patents and applications, which is crucial for determining current ownership and potential licensing opportunities.