ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,703,181, issued on Aug. 11, was assigned to Seiko Epson Corp. (Tokyo).
"Liquid ejection apparatus and print head" was invented by Sukehiro Ito (Matsumoto, Japan) and Masayuki Kawakami (Matsumoto, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A liquid ejection apparatus includes a control circuit, a drive signal output circuit that outputs a drive signal, and a print head that ejects a liquid, in which the print head includes a piezoelectric element that is driven by receiving the drive signal, a pressure chamber substrate that is provided with a plurality of pressure chambers of which volumes change due to deformation, a switch circuit that switc...