ALEXANDRIA, Va., March 19 -- United States Patent no. 12,251,931, issued on March 18, was assigned to Seiko Epson Corp. (Tokyo).
"Liquid ejecting apparatus" was invented by Yasuhiko Kosugi (Nagano, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A liquid ejecting apparatus includes a driven element that is driven by a drive signal; an ejection head that ejects a liquid when the driven element is driven; a drive circuit that outputs the drive signal, the drive circuit including an amplifier circuit that includes a first transistor and amplifies, based on an amplification voltage and through an operation of the first transistor, a base drive signal based on which the drive signal is generated; and a leaka...