ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,552,637, issued on Feb. 17, was assigned to INVENTIO AG (Hergiswil, Switzerland).
"Method and monitoring device for inferring a health status of call devices in an elevator arrangement" was invented by Christopher Mason (Ledgewood, N.J.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for inferring a health status of call devices in an elevator arrangement uses a monitoring device for implementing the method steps of: determining elevator usage information by detecting: changing of an opening status of an elevator door, interrupting of a light curtain at an entry to an elevator car, and/or changing of a weight of the elevator car; determining ele...