Trademark Overview
On Tuesday, October 21, 2025, a trademark application was filed for KEYSTONE with the United States Patent and Trademark Office. The USPTO has given the KEYSTONE trademark a serial number of 99454197. The federal status of this trademark filing is PUBLICATION/ISSUE REVIEW COMPLETE as of Monday, March 16, 2026. This trademark is owned by OneKey MLS LLC. The KEYSTONE trademark is filed in the Computer & Software Services & Scientific Services category with the following description:
Software as a service (SAAS) services featuring software for real estate brokers, real estate agents, and real estate firms for purposes of database management, data analysis, project and workflow management, marketing efforts, listing management, brokerage management, single sign on access, user authentication, and for providing third-party users and clients with the ability access, compare, and save information on real estate listings; Computer services, namely, hosting an interactive web site that allows real estate brokers, real estate agents, and real estate firms for purposes of database management, data analysis, project and workflow management, marketing efforts, listing management, brokerage management, single sign on access, user authentication, and and for providing third-party users and clients with the ability access, compare, and save information on real estate listings
