Assignee
RIKEN KEIKI KK
JP·22 granted patents·10 pending applications·232 citations·filing 1986–2024
Top patents by PatentIndex Score
32 records- 0185US7479255B2Gas sensorRIKEN KEIKI KK·Filed 2002·Granted Jan 20, 2009·33 cites·15 claims
- 0284US6606897B1Portable gas detector and its cradleRIKEN KEIKI KK·Filed 2000·Granted Aug 19, 2003·37 cites·5 claims
- 0382US7178381B2Portable gas detectorRIKEN KEIKI KK·Filed 2004·Granted Feb 20, 2007·22 cites·6 claims
- 0477US10132746B2Methane number calculation method and methane number measurement deviceRIKEN KEIKI KK·Filed 2016·Granted Nov 20, 2018·2 cites·8 claims
- 0572US7086283B2Explosion-proof portable gas detectorRIKEN KEIKI KK·Filed 2004·Granted Aug 8, 2006·12 cites·19 claims
- 0671US6744373B2Portable gas alarm deviceRIKEN KEIKI KK·Filed 2002·Granted Jun 1, 2004·31 cites·9 claims
- 0769US2025116641A1Gas DetectorRIKEN KEIKI KK·Filed 2024·Application pending·0 cites
- 0869US2025116643A1Gas DetectorRIKEN KEIKI KK·Filed 2024·Application pending·0 cites
- 0967US10816413B2Calorific value measuring device and calorific value measuring methodRIKEN KEIKI KK·Filed 2016·Granted Oct 27, 2020·1 cites·4 claims
- 1064USD447974SPortable gas detector-alarmRIKEN KEIKI KK·Filed 2000·Granted Sep 18, 2001·16 cites·1 claims
- 1160US7101716B2Formaldehyde detecting materialRIKEN KEIKI KK·Filed 2003·Granted Sep 5, 2006·8 cites·16 claims
- 1259US7837935B2Joint for joining hydrogen gas running route-forming members and portable hydrogen flame ionization gas detectorRIKEN KEIKI KK·Filed 2006·Granted Nov 23, 2010·1 cites·12 claims
- 1357US7526942B2Contact combustion gas sensorRIKEN KEIKI KK·Filed 2004·Granted May 5, 2009·4 cites·10 claims
- 1457US7089779B2Portable gas detectorRIKEN KEIKI KK·Filed 2004·Granted Aug 15, 2006·2 cites·10 claims
- 1557US4740730AApparatus for detecting low-speed electronsRIKEN KEIKI KK·Filed 1986·Granted Apr 26, 1988·13 cites·12 claims
- 1655US6712586B2Gas suction pump device, gas feed adapter and gas alarm unitRIKEN KEIKI KK·Filed 2002·Granted Mar 30, 2004·10 cites·20 claims
- 1751US2010297488A1Explosion-proof structure of power source part, explosion-proof type battery unit and explosion-proof type gas alarmRIKEN KEIKI KK·Filed 2009·Application pending·0 cites
- 1849US11193917B2Composition analysis apparatus and composition analysis methodRIKEN KEIKI KK·Filed 2019·Granted Dec 7, 2021·0 cites·16 claims
- 1949US5250260ATape for detecting hydridesRIKEN KEIKI KK·Filed 1992·Granted Oct 5, 1993·14 cites·6 claims
- 2047US6456943B1Carbon dioxide concentration sensorRIKEN KEIKI KK·Filed 1999·Granted Sep 24, 2002·21 cites·17 claims
- 2147US2005092065A1Portable gas detectorRIKEN KEIKI KK·Filed 2004·Application pending·0 cites
- 2245US10697920B2Gas sensorRIKEN KEIKI KK·Filed 2017·Granted Jun 30, 2020·0 cites·4 claims
- 2345US10697912B2Gas detection method and gas detectorRIKEN KEIKI KK·Filed 2018·Granted Jun 30, 2020·0 cites·12 claims
- 2445US2024210373A1Calculation device, calculation method, and programRIKEN KEIKI KK·Filed 2021·Application pending·0 cites
- 2544US6436258B1Galvanic-cell gas sensorRIKEN KEIKI KK·Filed 2000·Granted Aug 20, 2002·3 cites·11 claims
- 2643US2007205363A1Photoelectron Measuring DeviceRIKEN KEIKI KK·Filed 2005·Application pending·0 cites
- 2742US2001010289A1Constant-potential coulometric ammonia gas sensorRIKEN KEIKI KK·Filed 2001·Application pending·0 cites
- 2841US2019025270A1Gas detectorRIKEN KEIKI KK·Filed 2018·Application pending·0 cites
- 2939US11531001B2Controlled potential electrolysis gas sensorRIKEN KEIKI KK·Filed 2019·Granted Dec 20, 2022·0 cites·6 claims
- 3034US2004057874A1Light-interference fluid characteristics analyzer and frame for such analyzerRIKEN KEIKI KK·Filed 2002·Application pending·0 cites
- 3132USD403603SWrist watch type gas measuring deviceRIKEN KEIKI KK·Filed 1997·Granted Jan 5, 1999·2 cites·1 claims
- 3229US2016258896A1Potentiostatic electrolytic gas sensorRIKEN KEIKI KK·Filed 2014·Application pending·0 cites
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