What is a title report in patent law?

A title report in patent law is a form used by the Assignment Division of the USPTO to report the name of the owner of an application or patent as shown by their records on a specific date. According to the MPEP:

The “title report” is a form which can be used under certain circumstances by the Assignment Division to report to someone within the Office the name of the owner of an application or patent as shown by the Assignment Division records on the date the title report is made.

These reports are used internally within the USPTO and are not available for direct request by applicants or attorneys.