Where can trademark assignment status information be found?

The correct choice, which indicates that trademark assignment status information can be found in the TSDR system, is accurate because the Trademark Status and Document Retrieval (TSDR) system is specifically designed by the USPTO to provide comprehensive and up-to-date information about trademarks. This includes details about the current status of a trademark application, registration, and any assignments that may have been recorded for that trademark.

TSDR allows users to access various documents related to trademark registrations, including assignment records, thereby offering a reliable source for individuals or entities seeking the latest information on trademark assignments. The TSDR system serves as the most authoritative and real-time source for such data, ensuring that users have access to accurate and pertinent information for their inquiries.

The other options fail to cite a resource suited for accessing assignment status. The standard USPTO filing guide does not provide specific details regarding assignment status. The USPTO's old database may not present current information, as it is not the primary resource for up-to-date assignment records. The legal documentation website may contain information related to trademarks but is not specifically focused on or as efficient for finding assignment status as the TSDR system.