ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,434,484, issued on Oct. 7, was assigned to Canon K.K. (Tokyo).
"Liquid ejection head" was invented by Kazuya Yoshii (Kanagawa, Japan), Soji Kondo (Kanagawa, Japan), Naozumi Nabeshima (Tokyo) and Keiichiro Tsukuda (Kanagawa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A liquid ejection head has an ejection module including a pressure chamber and an ejection element configured to eject a liquid in the pressure chamber, a supply channel, a collection channel connected to the supply channel through a pressure chamber, a first pressure adjustment unit, a second pressure adjustment unit, and a circulation pump. A controlled pressure in the first press...