ALEXANDRIA, Va., June 12 -- United States Patent no. 12,297,661, issued on May 13, was assigned to ASSA ABLOY AB (Stockholm).
"Magnet in bolt" was invented by Mats Cederblad (Sigtuna, Sweden), Tomas Jonsson (Ronninge, Sweden), Per Mackegard (Solna, Sweden) and Stefan Johansson (Stockholm).
According to the abstract* released by the U.S. Patent & Trademark Office: "It is provided a lock assembly comprising: a striking plate assembly comprising an aperture and a magnetometer arranged in proximity of the aperture; a bolt being displaceable to enable movement through the aperture of the striking plate assembly, the bolt comprising a magnet; and a sensor device for detecting proximate presence of an object, wherein the sensor device is configu...