How does an assignee establish ownership in a patent application?

An assignee establishes ownership in a patent application by filing a statement under 37 CFR 3.73(c). According to MPEP 325:

“The statement under 37 CFR 3.73(c) must be filed in the application or patent where ownership must be established and must contain:
(A) documentary evidence of a chain of title from the original owner to the assignee; or
(B) a statement specifying where documentary evidence of a chain of title from the original owner to the assignee is recorded in the assignment records of the Office.”

This statement serves as proof of the assignee’s right to take action in the application.

For more information on assignee ownership, visit: assignee ownership.

For more information on chain of title, visit: chain of title.