ALEXANDRIA, Va., March 26 -- United States Patent no. 12,257,851, issued on March 25, was assigned to Canon K.K. (Tokyo).
"Liquid ejection head and liquid ejection apparatus" was invented by Manabu Ohara (Tokyo), Naozumi Nabeshima (Tokyo), Soji Kondo (Kanagawa, Japan) and Kazuya Yoshii (Kanagawa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A liquid ejection head includes: an ejection element configured to generate a pressure for ejecting the liquid; a supply channel through which the liquid is supplied to a pressure chamber; a collection channel connected to the supply channel through the pressure chamber and through which the liquid is collected from the pressure chamber; a circulation pump capable...