ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,482,632, issued on Nov. 25, was assigned to DAIHEN Corp. (Osaka, Japan).
"High-frequency power supply apparatus" was invented by Yuichi Hasegawa (Osaka, Japan) and Yuya Ueno (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A high-frequency power supply apparatus includes a first power supply, a second power supply, a matching circuit, and a low-pass filter. The first power supply outputs a high-frequency voltage with a first fundamental frequency toward a load. The second power supply outputs, toward the load, a negative polarity voltage with a second fundamental frequency lower than the first fundamental frequency. The matching circuit is c...