ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,540,491, issued on Feb. 3.
"Electronic lock system" was invented by John Joseph Ryan (Milwaukee).
According to the abstract* released by the U.S. Patent & Trademark Office: "The embodiments presented within provide methods, devices, and systems that improve access control through the use of smart cylinder locks. In one embodiment, a smart cylinder may perform a process including receiving a key, emitting an energy source of electromagnetic radiation; detecting a change in the energy source due to a physical property of the key, determining the physical property of the key from the change in the energy source, comparing the physical property with a predetermined value, and engaging a m...