ALEXANDRIA, Va., March 3 -- United States Patent no. 12,566,005, issued on March 3, was assigned to Airthings ASA (Oslo, Norway).
"Presence detection" was invented by Mattis Pettersen (Oslo, Norway).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of estimating occupancy of a room, comprising: acquiring a plurality of measurements of an aspect of air quality in the room; and estimating the occupancy of the room based on the plurality of measurements and a room ventilation rate parameter. By estimating the occupancy of the room based on aspects of air quality, it is possible to detect occupancy based on data from sensors which may already be present for other purposes (e.g. for measuring air quality). C...