ALEXANDRIA, Va., April 7 -- United States Patent no. 12,595,152, issued on April 7, was assigned to TK Elevator Corp. (Alpharetta, Ga.).
"Precise elevator car speed and position system" was invented by Michael Palazzola (Horn Lake, Miss.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An elevator car positioning system includes a plurality of magnetic field producers, each of the plurality of magnetic field producers located in a position corresponding to an entry/exit point of an elevator. A giant magnetoresistance (GMR) sensor is disposed on an elevator car of the elevator to detect individual ones of the plurality of magnetic field producers when within a given detection range of the GMR sensor and generat...