ALEXANDRIA, Va., Feb. 12 -- United States Patent no. 12,222,444, issued on Feb. 11.
"Side looking occupancy sensor" was invented by Louia Weidman (Carlsbad, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A side looking occupancy sensor is incorporated in a conventional wall switch mounted into a switch box adjacent to a door. The side-looking proximity sensor preferably is mountable to either side of the doorjamb to make the side-looking proximity sensor face the door opening. During operation, the side-looking sensor monitors the door movement or senses the passage of a person for indication that a person is entering or leaving the space. Entry and exit determination is made based on activation of th...