US Patent Issued to Seiko Epson on June 30 for "Liquid ejection apparatus and failure diagnostic method for head unit" (Japanese Inventors)

ALEXANDRIA, Va., July 16 -- United States Patent no. 12,668,055, issued on June 30, was assigned to Seiko Epson Corp. (Tokyo).

"Liquid ejection apparatus and failure diagnostic method for head unit" was invented by Masayuki Kawakami (Matsumoto, Japan), Yasuhiko Kosugi (Matsumoto, Japan) and Tomohiro Matsubayashi (Matsumoto, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A liquid ejection apparatus includes a first print head receiving a drive signal and ejecting a liquid, a temperature information output circuit acquiring a first temperature signal indicating a temperature of the first print head and outputting a temperature information signal, and a state determination circuit determining a state of t...