ALEXANDRIA, Va., July 16 -- United States Patent no. 12,358,298, issued on July 15, was assigned to Canon K.K. (Tokyo).
"Liquid ejection apparatus" was invented by Akane Hisanaga (Tokyo), Hiroshi Yamada (Kanagawa, Japan) and Hiroshi Koshikawa (Kanagawa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A liquid ejection apparatus is equipped with a liquid ejection head configured to eject a supplied liquid, a storage unit configured to store the liquid to be supplied to the liquid ejection head, a pivot member configured to be dipped in the stored liquid in the storage unit and be revolvable according to the amount of the liquid, and a detection unit configured to detect the amount of the liquid by use of...