ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,706,545, issued on Aug. 11, was assigned to Neturen Co. Ltd. (Tokyo).
"Dual-frequency power-supply apparatus, high-frequency heating apparatus, and high-frequency quenching apparatus" was invented by Masato Sugimoto (Tokyo), Hirotaka Tanaka (Tokyo) and Yohei Masuda (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided are a dual-frequency power-supply apparatus, a high-frequency heating apparatus, and a high-frequency quenching apparatus having a high durability.A dual-frequency power-supply apparatus 1 includes a power supply 10 that alternately outputs a low-frequency current and a high-frequency current. The power supply 10 has an inverter 3...