ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,379,692, issued on Aug. 5, was assigned to SEIKO EPSON Corp. (Japan).
"Timepiece parts and timepiece" was invented by Tsubasa Fuji (Shiojiri, Japan) and Daiki Furusato (Ina, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A timepiece part includes a base and a color toning layer provided on the base. The color toning layer includes a first oxide film, a first metal film, a protective film, and a second oxide film. The first oxide film is provided between the base and the second oxide film. Between the first oxide film and the second oxide film, the first metal film and the protective film are provided in the presented order from the side facing the ...