ALEXANDRIA, Va., Sept. 15 -- United States Patent no. 12,734,817, issued on Sept. 15, was assigned to Seiko Epson Corp. (Tokyo).

"Liquid ejection apparatus and liquid storage device" was invented by Masahiko Yoshida (Shiojiri, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A liquid ejection apparatus includes a storage container configured to store a liquid, a reference electrode, a first electrode, a second electrode, an output unit configured to output an output signal corresponding to electric signals from the first electrode and the second electrode, and an identification unit configured to identify a remaining amount of the liquid, wherein the first electrode has contact with the liquid stored, th...