Which entity should be contacted for questions regarding trademark assignment?

The Assignment Recordation Branch is the correct entity to contact for questions regarding trademark assignment. This branch is specifically designated within the United States Patent and Trademark Office (USPTO) to handle matters related to the recording of assignments, which include transferring ownership of trademarks from one party to another. They maintain the official records concerning trademark assignments and can provide guidance on the procedures and requirements for filing such documents.

The U.S. Patent Office, while it does oversee patents and trademarks, does not specifically focus on assignments alone; thus, it would not be the best resource for specific questions about trademark assignment processes. Local courts are typically involved in legal disputes and enforcement rather than in the administrative processes of recording trademark assignments. The Federal Bureau of Investigation's role pertains to criminal investigations and law enforcement, making it entirely unrelated to trademark assignments.