U.S. federal trademark · Serial No. 75343505
providing a lost key identification and retrieval service, namely, maintaining a database on all subscribers to such service and providing identification tags to them for their keys which instruct other persons finding said keys to deposit the keys in any mail box, postage guaranteed, receiving lost keys via the mail, and locating the owners of the lost keys and returning their keys
Source: USPTO federal trademark records. Informational only, not legal advice. Status and details may lag the live USPTO database.