ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,542,525, issued on Feb. 3, was assigned to TDK Corp. (Tokyo).
"Notch filter" was invented by Katsunari Moriai (Tokyo), Shunsuke Ogura (Tokyo), Takeshi Oyanagi (Tokyo), Ryo Morita (Tokyo) and Yusuke Imai (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A notch filter 100 includes a varistor 1 that is connected between a signal line SL and a ground G. The varistor 1 has a capacitive component and outputs a signal with a second frequency different from a signal with a first frequency flowing in the signal line SL and a signal with the second frequency superimposed on the signal line SL to the ground G."
The patent was filed on Jan. 19, 2023, under App...