ALEXANDRIA, Va., June 19 -- United States Patent no. 12,334,894, issued on June 17, was assigned to TDK Corp. (Tokyo).
"Band-pass filter" was invented by Yuki Matsumoto (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A band-pass filter includes a first port, a second port, first to third high-pass filters provided between the first port and the second port in this order from a first-port side in a circuit configuration, and a low-pass filter provided between the second high-pass filter and the third high-pass filter in the circuit configuration. Each of the first to third high-pass filters forms an attenuation pole on a low-pass side of the passband. A frequency of the attenuation pole formed by the se...