ALEXANDRIA, Va., April 7 -- United States Patent no. 12,594,761, issued on April 7, was assigned to Canon K.K. (Tokyo).
"Liquid ejection head and printing apparatus" was invented by Ayako Maruyama (Kanagawa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A liquid ejection head being for liquid suction and wipe operations and enabling diaphragm plates to achieve proper amounts of displacement with low drive voltage includes first and second substrates. Ejection ports for ejecting liquid are provided at a flat first surface of the first substrate. Drive elements are provided on a second surface of the first substrate. The second substrate is joined to the second surface of the first substrate, forming pr...