ALEXANDRIA, Va., June 4 -- United States Patent no. 12,320,444, issued on June 3, was assigned to MICROPROGRAM INFORMATION Co. LTD. (Taichung, Taiwan) and TRANSWORLD STEEL ENTERPRISE Co. LTD. (Taichung, Taiwan).
"Warning device for valve maintenance" was invented by Teng Yen Wu (Taichung, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A warning device is mounted on a valve including a valve body, a valve seat and a valve stem. The warning device comprises a base, a shaft, a sensing module, a control module and a warning module. The base is connected to the valve body. The shaft has a shaft body and a first sensing member. A profile of a cross section of the shaft being passed through by the first sens...