US Patent Issued to NIHON DEMPA KOGYO on Sept. 2 for "Quartz-crystal vibrating piece, crystal unit, crystal controlled oscillator, and intermediate wafer for quartz-crystal vibrating piece" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 3 -- United States Patent no. 12,407,321, issued on Sept. 2, was assigned to NIHON DEMPA KOGYO Co. LTD. (Tokyo).

"Quartz-crystal vibrating piece, crystal unit, crystal controlled oscillator, and intermediate wafer for quartz-crystal vibrating piece" was invented by Tatsuya Fujita (Saitama, Japan) and Yukihiro Okajima (Saitama, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A quartz-crystal vibrating piece includes an element unit, excitation electrodes, and an extraction electrode. The element unit includes a vibrator, a first thick portion, and second thick portions. The vibrator has a quadrilateral shape in plan view, vibrates in a thickness-shear mode, and has a thickness t1. ...