ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,521,981, issued on Jan. 13, was assigned to CANON K.K. (Tokyo).
"Head substrate" was invented by Yasuo Fujii (Kanagawa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A head substrate including a plurality of arrays in each of which a plurality of liquid ejection heads for ejecting a liquid and a plurality of heaters are disposed, includes: one or more first reception units configured to receive communication data including heater selection data on a plurality of arrays, the heater selection data being for selecting the heaters; and one second reception unit configured to receive communication data including heater selection data on a single array...