ALEXANDRIA, Va., March 5 -- United States Patent no. 12,244,286, issued on March 4, was assigned to DAIHEN Corp. (Osaka, Japan).

"Impedance matching device and high-frequency power supply system" was invented by Yuichi Hasegawa (Osaka, Japan) and Yuya Ueno (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure, calculating an impedance change considering a reflected wave due to IMD, provides an impedance matching device for performing impedance matching between a source power supply side and a load side, including: a detector that detects a forward wave power supplied from the source power supply and a reflected wave power from the load and outputs a forward wave voltage as a com...