What is the difference between recording a license and an assignment at the USPTO?

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Source: FAQ (MPEP-Based) BlueIron Update: 2024-09-09 10 Rules 5 Related FAQs 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. The main difference between recording a license and an assignment at the USPTO lies in the transfer of ownership rights: Assignment: Transfers ownership of the patent or application to another party. License: Grants permission to use the patent or application without transferring ownership. According to MPEP 313 : Other documents relating to interests in patents or applications will be recorded as provided in 37 CFR 3.11(a). This includes licenses, which are recorded to provide notice of the agreement but do not change the ownership records at the USPTO. Related Rules from the Manual of Patent Examining Procedure 10 rules Collapse Other Documents Relating to Patents Must Be Recorded MPEP 313 Recording of Assignments and Other Documents Affecting Patent Title MPEP 313 Assignments of Patents Must Be Recorded MPEP 313 Required Requirement for Transfer of Ownership Interest MPEP 301 Requirement for Transfer of Ownership Interest MPEP 301 Unrecorded Document Petition MPEP 313 Permitted Recordation Does Not Determine Title Effect MPEP 313 Effect of Document on Title Determined by Office MPEP 313 Required Assignment Must Be Recorded to Take Action MPEP 325 Assignment of Ownership Must Be in Writing MPEP 324 Other Related FAQs 5 FAQs Collapse Why does the USPTO record documents other than assignments? What can I do if the USPTO refuses to record a document I believe should be recorded? Does the USPTO determine the legal effect of recorded documents on patent ownership? What types of documents can be recorded in the USPTO besides assignments? Are attorney&#8217;s liens against patents or patent applications recordable at the USPTO?