Inventor

MATSUO KIYOHARU

JP3 patents

Patents

3 patents

US12388415B2Aug 12, 2025

Crystal unit, semimanufactured crystal unit, and method for manufacturing crystal unit

NIHON DEMPA KOGYO CO0 citations56

US6972511B2Dec 6, 2005

Quartz-crystal unit

NIHON DEMPA KOGYO CO6 citations55

US11251773B2Feb 15, 2022

AT-cut crystal element, crystal unit, and semi-manufactured crystal unit

NIHON DEMPA KOGYO CO0 citations43