Tatsuya Kumagai

Person

Hitachi-shi, Ibaraki 319-14, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Sagnac optical ingredient-measuring apparatus with circular polariz...
- Patent number 8,730,481
- Issue date May 20, 2014
- Hitachi Metals, Ltd.
- Tatsuya Kumagai
- G01 - MEASURING TESTING
Information Patent Grant
Optical fiber vibration sensor
- Patent number 7,992,440
- Issue date Aug 9, 2011
- Hitachi Cable, Ltd.
- Tatsuya Kumagai
- G01 - MEASURING TESTING
Information Patent Grant
Method for detecting fault of optical fiber gyro and apparatus for...
- Patent number 5,701,177
- Issue date Dec 23, 1997
- Hitachi Cable, Ltd.
- Tatsuya Kumagai
- G01 - MEASURING TESTING
Information Patent Grant
Phase adjustable optical fiber gyro using both even order harmonics...
- Patent number 5,608,525
- Issue date Mar 4, 1997
- Hitachi Cable, Ltd.
- Tatsuya Kumagai
- G01 - MEASURING TESTING
Information Patent Grant
Optical fiber gyro with memory storing data measured under applicat...
- Patent number 5,555,235
- Issue date Sep 10, 1996
- Hitachi Cable, Ltd.
- Tatsuya Kumagai
- G01 - MEASURING TESTING
Information Patent Grant
Optical fiber gyro
- Patent number 5,471,301
- Issue date Nov 28, 1995
- Hitachi Cable, Ltd.
- Tatsuya Kumagai
- G01 - MEASURING TESTING
Information Patent Grant
Fiber-optic gyroscope having angular velocity correction
- Patent number 5,396,327
- Issue date Mar 7, 1995
- Hitachi Cable, Ltd.
- Tatsuya Kumagai
- G01 - MEASURING TESTING
Information Patent Grant
Interference sensor and method utilizing extracted alliasing freque...
- Patent number 5,264,914
- Issue date Nov 23, 1993
- Shigeru Oho
- G01 - MEASURING TESTING
Information Patent Grant
An improved optical branching/coupling unit for an optical fiber gy...
- Patent number 5,208,652
- Issue date May 4, 1993
- Hitachi, Ltd.
- Hisao Sonobe
- G01 - MEASURING TESTING
Information Patent Grant
Polarized wave preserving fiber
- Patent number 4,818,047
- Issue date Apr 4, 1989
- Hitachi Cable Limited
- Yuuetsu Takuma
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
OPTICAL FIBER VIBRATION SENSOR
- Publication number 20120224169
- Publication date Sep 6, 2012
- Hitachi Cable, Ltd.
- Tatsuya KUMAGAI
- G01 - MEASURING TESTING
Information Patent Application
OPTICAL INGREDIENT-MEASURING APPARATUS
- Publication number 20120218555
- Publication date Aug 30, 2012
- Hitachi Cable, Ltd.
- Tatsuya KUMAGAI
- G01 - MEASURING TESTING
Information Patent Application
Optical fiber vibration sensor
- Publication number 20100281985
- Publication date Nov 11, 2010
- Hitachi Cable, Ltd.
- Tatsuya Kumagai
- G01 - MEASURING TESTING

Tatsuya Kumagai

Person

Patents Grantslast 30 patents

Sagnac optical ingredient-measuring apparatus with circular polariz...

Optical fiber vibration sensor

Method for detecting fault of optical fiber gyro and apparatus for...

Phase adjustable optical fiber gyro using both even order harmonics...

Optical fiber gyro with memory storing data measured under applicat...

Optical fiber gyro

Fiber-optic gyroscope having angular velocity correction

Interference sensor and method utilizing extracted alliasing freque...

An improved optical branching/coupling unit for an optical fiber gy...

Polarized wave preserving fiber

Patents Applicationslast 30 patents

OPTICAL FIBER VIBRATION SENSOR

OPTICAL INGREDIENT-MEASURING APPARATUS

Optical fiber vibration sensor