ALEXANDRIA, Va., July 7 -- United States Patent no. 12,673,487, issued on July 7, was assigned to SEIKO EPSON Corp. (Japan).
"Drive circuit board and liquid ejection apparatus" was invented by Dai Nozawa (Matsumoto, Japan) and Noritaka Ide (Shiojiri, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A drive circuit board configured to output a first drive signal and a second drive signal for driving a capacitive load includes a first drive circuit configured to output the first drive signal, a second drive circuit configured to output the second drive signal, a base drive signal output circuit configured to output a first base drive signal and a second base drive signal, a connector from which the first b...