ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,454,440, issued on Oct. 28, was assigned to MITSUBISHI ELECTRIC Corp. (Tokyo).
"Maintenance device and elevator device" was invented by Tomohiro Hattori (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A maintenance device (18) includes, for example, a clock (20), a clock (21), a selection unit (23), and a recording unit (25). The clock (20) outputs time information. The clock (21) outputs time information. The selection unit (23) selects at least one of the clock (20) or the clock (21) as a clock to be used. The recording unit (25) records elevator information by adding time information from the selected clock to the elevator information. The sele...