Assignee
RIKEN KK
JP·146 granted patents·15 pending applications·3,216 citations·filing 1977–2015
Top patents by PatentIndex Score
161 records- 0198US6773565B2NOx sensorRIKEN KK·Filed 2001·Granted Aug 10, 2004·316 cites·25 claims
- 0294US9359921B2Sintered iron-based alloy valve seatRIKEN KK·Filed 2013·Granted Jun 7, 2016·36 cites·6 claims
- 0393US4575913AMethod of joining tubular member and annular partsRIKEN KK·Filed 1983·Granted Mar 18, 1986·48 cites·2 claims
- 0490US7955691B2Hard amorphous carbon filmRIKEN KK·Filed 2006·Granted Jun 7, 2011·11 cites·5 claims
- 0590US5246257ASkew pipe couplingRIKEN KK·Filed 1992·Granted Sep 21, 1993·70 cites·7 claims
- 0687US5141714AExhaust gas cleanerRIKEN KK·Filed 1990·Granted Aug 25, 1992·78 cites·11 claims
- 0787US5080713AHard alloy particle dispersion type wear resisting sintered ferro alloy and method of forming the sameRIKEN KK·Filed 1989·Granted Jan 14, 1992·49 cites·20 claims
- 0886US7207571B2Steel piston ringRIKEN KK·Filed 2005·Granted Apr 24, 2007·14 cites·2 claims
- 0986US5260128AElectromagnetic shielding sheetRIKEN KK·Filed 1991·Granted Nov 9, 1993·88 cites·8 claims
- 1086US5075274AExhaust gas cleanerRIKEN KK·Filed 1990·Granted Dec 24, 1991·76 cites·12 claims
- 1185US5602448AElectric powered bicycleRIKEN KK·Filed 1996·Granted Feb 11, 1997·48 cites·5 claims
- 1284US7241327B2Iron-based sintered alloy with dispersed hard particlesRIKEN KK·Filed 2005·Granted Jul 10, 2007·6 cites·6 claims
- 1384US4681817APiston ringRIKEN KK·Filed 1985·Granted Jul 21, 1987·66 cites·9 claims
- 1483US5743536APiston ringRIKEN KK·Filed 1996·Granted Apr 28, 1998·48 cites·7 claims
- 1583US4746635AHigh strength and high hardness alumina-zirconia-silicon carbide sintered ceramic composite and its manufacturing processRIKEN KK·Filed 1986·Granted May 24, 1988·40 cites·11 claims
- 1682US9338932B2Magnetoplumbite-type hexagonal ferriteRIKEN KK·Filed 2014·Granted May 10, 2016·4 cites·4 claims
- 1782US9303765B2Combined oil control ringRIKEN KK·Filed 2014·Granted Apr 5, 2016·4 cites·6 claims
- 1882US9085690B2Resin composition and sliding member using sameRIKEN KK·Filed 2012·Granted Jul 21, 2015·3 cites·8 claims
- 1982US6787014B2Gas-detecting element and gas-detecting device comprising sameRIKEN KK·Filed 2002·Granted Sep 7, 2004·21 cites·6 claims
- 2082US4204031AIron-base sintered alloy for valve seat and its manufactureRIKEN KK·Filed 1977·Granted May 20, 1980·35 cites·8 claims
- 2181US9206907B2Seal ringRIKEN KK·Filed 2012·Granted Dec 8, 2015·5 cites·4 claims
- 2281US7438037B2Internal combustion engine and liner installation ringRIKEN KK·Filed 2004·Granted Oct 21, 2008·22 cites·11 claims
- 2381US6972162B2Solid polymer electrolyte fuel cell unitRIKEN KK·Filed 2003·Granted Dec 6, 2005·21 cites·16 claims
- 2481US5051672AAutomatic window/door systemRIKEN KK·Filed 1990·Granted Sep 24, 1991·50 cites·1 claims
- 2580US6673223B2Gas sensing and oxygen pumping device, and apparatus using the sameRIKEN KK·Filed 2001·Granted Jan 6, 2004·18 cites·9 claims
- 2679US7052019B2Piston ring and method of manufacturing the sameRIKEN KK·Filed 2001·Granted May 30, 2006·26 cites·3 claims
- 2779US6802883B2Iron-based sintered alloy for use as valve seat and its production methodRIKEN KK·Filed 2003·Granted Oct 12, 2004·14 cites·22 claims
- 2879US5972128ACast iron and piston ringRIKEN KK·Filed 1997·Granted Oct 26, 1999·22 cites·4 claims
- 2977US5851659ASliding members and a method of preparation thereofRIKEN KK·Filed 1994·Granted Dec 22, 1998·33 cites·6 claims
- 3076US5645804AMethod for cleaning exhaust gas containing nitrogen oxidesRIKEN KK·Filed 1995·Granted Jul 8, 1997·47 cites·24 claims
- 3175US7759015B2Separator for fuel cell with austenitic stainless steel substrateRIKEN KK·Filed 2005·Granted Jul 20, 2010·2 cites·3 claims
- 3275US7036823B2Side rail and combined oil control ring incorporated with the side rails for reduction of oil consumptionRIKEN KK·Filed 2002·Granted May 2, 2006·22 cites·6 claims
- 3375US6551497B1Measuring NOx concentrationRIKEN KK·Filed 1999·Granted Apr 22, 2003·43 cites·4 claims
- 3475US5340548AExhaust gas cleaner and method of cleaning exhaust gasRIKEN KK·Filed 1993·Granted Aug 23, 1994·24 cites·4 claims
- 3575US5208202AExhaust gas cleaner and method of cleaning exhaust gas catalyst for cleaning exhaust gasRIKEN KK·Filed 1991·Granted May 4, 1993·28 cites·17 claims
- 3674US6784419B1Electromagnetic wave absorberRIKEN KK·Filed 2000·Granted Aug 31, 2004·25 cites·7 claims
- 3774US5290530AMethod of cleaning exhaust gasRIKEN KK·Filed 1992·Granted Mar 1, 1994·32 cites·3 claims
- 3873US6852438B2Embossed current collector separator for electrochemical fuel cellRIKEN KK·Filed 2001·Granted Feb 8, 2005·11 cites·12 claims
- 3973US6319377B1Nitrogen oxide sensorRIKEN KK·Filed 1998·Granted Nov 20, 2001·41 cites·10 claims
- 4073US6303011B1Gas sensorRIKEN KK·Filed 1998·Granted Oct 16, 2001·41 cites·13 claims
- 4173US4950380ALimiting current-type oxygen sensorRIKEN KK·Filed 1989·Granted Aug 21, 1990·32 cites·4 claims
- 4273US4429885ASpacer and expander member for holding and biasing piston ring railsRIKEN KK·Filed 1982·Granted Feb 7, 1984·30 cites·3 claims
- 4372US7523944B2Seal ringRIKEN KK·Filed 2004·Granted Apr 28, 2009·27 cites·8 claims
- 4472US5747410AExhaust gas cleaner and method of cleaning exhaust gasRIKEN KK·Filed 1995·Granted May 5, 1998·46 cites·23 claims
- 4572US5741468AExhaust gas cleaner and method for cleaning exhaust gasRIKEN KK·Filed 1995·Granted Apr 21, 1998·41 cites·41 claims
- 4671US6019881ANOx sensorRIKEN KK·Filed 1998·Granted Feb 1, 2000·36 cites·2 claims
- 4771US5935529AExhaust gas cleaner and method for cleaning exhaust gasRIKEN KK·Filed 1996·Granted Aug 10, 1999·38 cites·17 claims
- 4871US5603388AElectric powered bicycleRIKEN KK·Filed 1995·Granted Feb 18, 1997·31 cites·3 claims
- 4971US5320999AExhaust gas cleaner and method of cleaning exhaust gasRIKEN KK·Filed 1992·Granted Jun 14, 1994·25 cites·8 claims
- 5070US5154901AMethod of cleaning an exhaust gas containing nitrogen oxides and fine carbon-containing particulatesRIKEN KK·Filed 1991·Granted Oct 13, 1992·31 cites·2 claims
Showing the top 50 of 161 patent records by PatentIndex Score.
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