Inventor
OBARA SHIGERU
JP10 patents
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NIHON DEMPA KOGYO CO
9 patentsUS6300707B1Oct 9, 2001
Quartz crystal unit
NIHON DEMPA KOGYO CO15 citations79
US7011887B2Mar 14, 2006
IT-cut quartz crystal unit
NIHON DEMPA KOGYO CO7 citations70
US10498311B2Dec 3, 2019
Crystal resonator
NIHON DEMPA KOGYO CO2 citations67
US10425059B2Sep 24, 2019
Crystal resonator
NIHON DEMPA KOGYO CO3 citations67
US7939768B2May 10, 2011
Crystal unit
NIHON DEMPA KOGYO CO6 citations61
US7061164B2Jun 13, 2006
Crystal oscillator
NIHON DEMPA KOGYO CO4 citations58
US6680560B2Jan 20, 2004
Heat resistant quartz-crystal unit
NIHON DEMPA KOGYO CO2 citations56
US7863802B2Jan 4, 2011
Quartz crystal element made of double-rotation Y-cut quartz crystal plate
NIHON DEMPA KOGYO CO1 citations51
US8030827B2Oct 4, 2011
Crystal unit
NIHON DEMPA KOGYO CO0 citations40