ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,508,803, issued on Dec. 30, was assigned to Seiko Epson Corp. (Tokyo).
"Printing device and printing method" was invented by Takamitsu Kondo (Nagano, Japan) and Satoru Kobayashi (Nagano, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A print head has a first nozzle group that includes a plurality of first nozzles capable of ejecting a first liquid onto a medium, and a second nozzle group that includes a plurality of second nozzles ejecting a second liquid that is more visible than the first liquid onto the medium. A detection section is capable of detecting a first defective nozzle, which is ejection failure, from the first nozzle group without pr...