US Patent Issued to SEIKO EPSON on Oct. 20 for "Resonator element and quartz crystal wafer" (Japanese Inventors)

ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,771,319, issued on Oct. 20, was assigned to SEIKO EPSON Corp. (Tokyo).

"Resonator element and quartz crystal wafer" was invented by Atsushi Matsuo (Shiojirir, Japan) and Katsuhiko Maki (Chino, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A resonator element includes an AT-cut quartz crystal substrate having a first surface that is a front surface and a second surface that is a rear surface with respect to the front surface, the two surfaces extending along the axes X and Z' of a quartz crystal, and further having side surfaces that link the first and second surfaces to each other, a first excitation electrode disposed at the first surface, a fir...