Inventor
DOI RYOUTA
JP10 patents
⚠️ This page may combine multiple inventors who share the name “DOI RYOUTA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
9 patentsUS6161378ADec 19, 2000
Exhaust gas purification apparatus of internal combustion engine and catalyst for purifying exhaust gas internal combustion engine
HITACHI LTD71 citations96
US4562123ADec 31, 1985
Liquid fuel cell
HITACHI LTD147 citations96
US4612261ASep 16, 1986
Fuel cell battery using acidic electrolyte
HITACHI LTD61 citations95
US6397582B1Jun 4, 2002
Exhaust gas purification apparatus of internal combustion engine and catalyst for purifying exhaust gas of internal combustion engine
HITACHI LTD24 citations92
US6272848B1Aug 14, 2001
Exhaust gas cleaning apparatus and method for internal combustion engine
HITACHI LTD49 citations92
US5968870AOct 19, 1999
Catalyst for purifying exhaust gas from internal combustion engine and purifying method thereof
HITACHI LTD24 citations92
US5972828AOct 26, 1999
Method of manufacturing catalyst for cleaning exhaust gas released from internal combustion engine, and catalyst for the same
HITACHI LTD12 citations73
US6596247B1Jul 22, 2003
Method for purifying exhaust gas from internal combustion engines
HITACHI LTD4 citations62
US6823659B2Nov 30, 2004
Moisture removal device and method thereof for internal combustion engine use exhaust gas cleaning device
HITACHI LTD4 citations60