Shuji Tajima

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Portable gas detector
- Patent number 7,178,381
- Issue date Feb 20, 2007
- Riken Keiki Co., Ltd.
- Shuji Tajima
- G01 - MEASURING TESTING
Information Patent Grant
Portable gas detector
- Patent number 7,089,779
- Issue date Aug 15, 2006
- Riken Keiki Co., Ltd.
- Shuji Tajima
- G01 - MEASURING TESTING
Information Patent Grant
Explosion-proof portable gas detector
- Patent number 7,086,283
- Issue date Aug 8, 2006
- Riken Keiki Co., Ltd.
- Junichi Koyano
- G01 - MEASURING TESTING
Information Patent Grant
Portable gas alarm device
- Patent number 6,744,373
- Issue date Jun 1, 2004
- Riken Keiki Co., Ltd.
- Junichi Koyano
- G08 - SIGNALLING
Information Patent Grant
Gas suction pump device, gas feed adapter and gas alarm unit
- Patent number 6,712,586
- Issue date Mar 30, 2004
- Riken Keiki Co., Ltd.
- Junichi Koyano
- G08 - SIGNALLING
Information Patent Grant
Portable gas detector and its cradle
- Patent number 6,606,897
- Issue date Aug 19, 2003
- Riken Keiki Co., Ltd.
- Juniti Koyano
- G01 - MEASURING TESTING
Information Patent Grant
Portable gas detector-alarm
- Patent number D447974
- Issue date Sep 18, 2001
- Riken Keiki Co., Ltd.
- Juniti Koyano
- D10 - Measuring, testing, or signalling instruments

Patents Applicationslast 30 patents

Information Patent Application
EXPLOSION-PROOF STRUCTURE OF POWER SOURCE PART, EXPLOSION-PROOF TYP...
- Publication number 20100297488
- Publication date Nov 25, 2010
- Riken Keiki Co., Ltd.
- Shuji Tajima
- G08 - SIGNALLING
Information Patent Application
Explosion-proof portable gas detector
- Publication number 20060010974
- Publication date Jan 19, 2006
- Riken Keiki Co., Ltd.
- Junichi Koyano
- G01 - MEASURING TESTING
Information Patent Application
Portable gas detector
- Publication number 20050092065
- Publication date May 5, 2005
- Riken Keiki Co., Ltd.
- Shuji Tajima
- G01 - MEASURING TESTING
Information Patent Application
Portable gas detector
- Publication number 20050092063
- Publication date May 5, 2005
- Riken Keiki Co., Ltd.
- Shuji Tajima
- G01 - MEASURING TESTING
Information Patent Application
Portable gas detector
- Publication number 20050092064
- Publication date May 5, 2005
- Riken Keiki Co., Ltd.
- Shuji Tajima
- G01 - MEASURING TESTING
Information Patent Application
Gas suction pump device, gas feed adapter and gas alarm unit
- Publication number 20030138329
- Publication date Jul 24, 2003
- Riken Keiki Co., Ltd.
- Junichi Koyano
- G08 - SIGNALLING
Information Patent Application
Portable gas alarm device
- Publication number 20030052792
- Publication date Mar 20, 2003
- Riken Keiki Co., Ltd.
- Junichi Koyano
- G08 - SIGNALLING