ALEXANDRIA, Va., July 16 -- United States Patent no. 12,358,292, issued on July 15, was assigned to Brother Kogyo K.K. (Nagoya, Japan).
"Monochrome inkjet printer" was invented by Akinari Ishibe (Okazaki, Japan) and Yoshinori Osakabe (Seto, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A monochrome inkjet printer used only for monochrome recording includes a first ink reservoir configured to accommodate dye ink, a first recording head communicating with the first ink reservoir and configured to record an image using the dye ink, a second ink reservoir configured to accommodate pigment ink, and a second recording head communicating with the second ink reservoir and configured to record an image using t...