ALEXANDRIA, Va., March 19 -- United States Patent no. 12,254,729, issued on March 18, was assigned to Schlage Lock Co. LLC (Carmel, Ind.).
"Ripple network access control system" was invented by Andrew Setter (Rochester, Minn.) and Joseph W. Baumgarte (Carmel, Ind.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An exemplary method includes operating an access control device in a standalone mode, which involves controlling a locked/unlocked state of the access control device locally, and operating a wireless transceiver of the access control device in a lower-power state in which the wireless transceiver is operable to receive a lockdown signal from an external device. The method further includes operating the...