Hirofumi Kawashima

Person

Sendai, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Method of adjusting frequency of NS-GT cut quartz resonator
- Patent number 5,469,010
- Issue date Nov 21, 1995
- Seiko Electronic Components Ltd.
- Hirofumi Kawashima
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Torsional quartz crystal resonator
- Patent number 5,334,900
- Issue date Aug 2, 1994
- Seiko Electronic Components Ltd.
- Hirofumi Kawashima
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
KT cut width-extensional mode quartz crystal resonator
- Patent number 5,311,096
- Issue date May 10, 1994
- Seiko Electronic Components Ltd.
- Hirofumi Kawashima
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Longitudinal quartz crystal resonator
- Patent number 5,218,260
- Issue date Jun 8, 1993
- Seiko Electronic Components Ltd.
- Hirofumi Kawashima
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Longitudinal quartz crystal resonator
- Patent number 5,059,853
- Issue date Oct 22, 1991
- Seiko Electric Components Ltd.
- Hirofumi Kawashima
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Longitudinal quartz crystal resonator
- Patent number 5,001,383
- Issue date Mar 19, 1991
- Seiko Electronic Components Ltd.
- Hirofumi Kawashima
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Face shear mode quartz crystal resonator
- Patent number 4,900,971
- Issue date Feb 13, 1990
- Seiko Electronic Components Ltd.
- Hirofumi Kawashima
- H03 - BASIC ELECTRONIC CIRCUITRY

Hirofumi Kawashima

Person

Patents Grantslast 30 patents

Method of adjusting frequency of NS-GT cut quartz resonator

Torsional quartz crystal resonator

KT cut width-extensional mode quartz crystal resonator

Longitudinal quartz crystal resonator

Longitudinal quartz crystal resonator

Longitudinal quartz crystal resonator

Face shear mode quartz crystal resonator