U.S. federal trademark · Serial No. 78004864
device attached to the outside of a common wall-mounted light switch cover plate, that secures the switch in either the ON or OFF position by physically restricting motion This device is mounted with a single (existing) screw and is intended for safety, convenience, or conservation considerations only
Source: USPTO federal trademark records. Informational only, not legal advice. Status and details may lag the live USPTO database.