ALEXANDRIA, Va., March 19 -- United States Patent no. 12,251,932, issued on March 18, was assigned to Seiko Epson Corp. (Tokyo).
"Ink jet system" was invented by Tomonaga Hasegawa (Matsumoto, Japan), Shunya Fukuda (Azumino, Japan) and Nobuaki Ito (Shiojiri, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An ink jet system includes a head unit that includes a nozzle discharging ink, a pressure chamber communicating with the nozzle, and a drive element applying pressure fluctuation to the ink in the pressure chamber by supplying a drive pulse, an acquisition portion that acquires output information including first output information regarding the head unit and/or second output information regarding the in...