ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,397,554, issued on Aug. 26, was assigned to Seiko Epson Corp. (Tokyo).
"Liquid ejection device and method for controlling liquid ejection device" was invented by Hiroyuki Tomimatsu (Suwa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A liquid ejection device includes a liquid ejection portion including a plurality of first nozzles configured to eject a first liquid containing an inorganic pigment and a plurality of second nozzles configured to eject a second liquid not containing a substance having a hardness the same as or higher than a hardness of the inorganic pigment contained in the first liquid, and a control portion, wherein the control po...