Inventor · disambiguated record
Ryouta Doi
Also filed as: DOI RYOUTA
10 granted patents·3 pending applications·401 citations·filing 1982–2007
92Inventor score
Top patents by PatentIndex Score
13 records- 0196US4562123ALiquid fuel cellHITACHI LTD·Filed 1984·Granted Dec 31, 1985·147 cites·22 claims
- 0294US6161378AExhaust gas purification apparatus of internal combustion engine and catalyst for purifying exhaust gas internal combustion engineHITACHI LTD·Filed 1997·Granted Dec 19, 2000·71 cites·29 claims
- 0391US4612261AFuel cell battery using acidic electrolyteHITACHI LTD·Filed 1982·Granted Sep 16, 1986·61 cites·23 claims
- 0484US6397582B1Exhaust gas purification apparatus of internal combustion engine and catalyst for purifying exhaust gas of internal combustion engineHITACHI LTD·Filed 2000·Granted Jun 4, 2002·24 cites·20 claims
- 0577US6272848B1Exhaust gas cleaning apparatus and method for internal combustion engineHITACHI LTD·Filed 1998·Granted Aug 14, 2001·49 cites·24 claims
- 0664US5968870ACatalyst for purifying exhaust gas from internal combustion engine and purifying method thereofHITACHI LTD·Filed 1997·Granted Oct 19, 1999·24 cites·11 claims
- 0757US7093432B2Exhaust gas purification apparatus of internal combustion engine and catalyst for purifying exhaust gas of internal combustion engineHONDA MOTOR CO LTD·Filed 2002·Granted Aug 22, 2006·5 cites·6 claims
- 0852US2007204595A1Exhaust Gas Purification Apparatus of Internal Combustion Engine and Catalyst for Purifying Exhaust Gas of Internal Combustion EngineHONDA MOTOR CO LTD·Filed 2007·Application pending·0 cites
- 0947US6823659B2Moisture removal device and method thereof for internal combustion engine use exhaust gas cleaning deviceHITACHI LTD·Filed 2003·Granted Nov 30, 2004·4 cites·4 claims
- 1044US5972828AMethod of manufacturing catalyst for cleaning exhaust gas released from internal combustion engine, and catalyst for the sameHITACHI LTD·Filed 1997·Granted Oct 26, 1999·12 cites·11 claims
- 1144US2005089456A1Exhaust gas purifcation apparatus of internal combustion engine and catalyst for purifying exhaust gas of internal combustion engineHITACHI LTD·Filed 2004·Application pending·0 cites
- 1240US2003154713A1Exhaust gas purifying device for internal combustion engineHITACHI LTD·Filed 2003·Application pending·0 cites
- 1334US6596247B1Method for purifying exhaust gas from internal combustion enginesHITACHI LTD·Filed 1999·Granted Jul 22, 2003·4 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →