ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,480,333, issued on Nov. 25, was assigned to SentriLock LLC (Cincinnati).
"Electronic lockbox" was invented by Scott R. Fisher (West Chester, Ohio), Alan F. Deardoff (Morrow, Ohio), Nancy C. Griffiths (West Chester, Ohio), Daniel C. Cambron (Lexington, Ky.) and Matthew K. Caskey (Loveland, Ohio).
According to the abstract* released by the U.S. Patent & Trademark Office: "An electronic lockbox uses a rotary actuator with multiple positions to achieve multiple locking states. Multiple positions of the actuator are detected, using optical sensors. The locking mechanism includes an outer sleeve and an inner cylindrical barrel that are coupled with torsion springs. The lockbox has a shackl...