What is a ‘chain of title’ in patent ownership?

A ‘chain of title’ in patent ownership refers to the documented history of a patent’s ownership from its original assignment to its current owner. MPEP 314 mentions this concept in relation to name changes and mergers:

Although a mere change of name does not constitute a change in legal entity, it is properly a link in the chain of title. Documents of merger are also proper links in the chain of title.

The chain of title includes:

• Original patent assignment
• Subsequent transfers of ownership
• Business name changes
• Mergers and acquisitions
• Any other events affecting patent ownership

Maintaining a clear and unbroken chain of title is crucial for establishing ownership rights, facilitating patent transactions, and providing clarity in potential patent litigation.