Inventor · disambiguated record
Hirotaka Tomizawa
Also filed as: TOMIZAWA HIROTAKA
29 granted patents·680 citations·filing 1987–2003
97Inventor score
Files withTONEN CORP13TOA NENRYO KOGYO KK8EXXON CHEMICAL PATENTS INC3NEW JAPAN CHEM CO LTD3EXXON RESEARCH ENGINEERING CO1
Top patents by PatentIndex Score
29 records- 0196US6667285B1Lubricating oil for refrigerator, hydraulic fluid composition for refrigerator and method for lubricating of refrigeratorNEW JAPAN CHEM CO LTD·Filed 2000·Granted Dec 23, 2003·88 cites·18 claims
- 0294US5185092ALubricating oil for refrigeratorTONEN CORP·Filed 1991·Granted Feb 9, 1993·100 cites·20 claims
- 0392US5356547ALubricating oil composition containing friction modifier and corrosion inhibitorEXXON RESEARCH ENGINEERING CO·Filed 1993·Granted Oct 18, 1994·62 cites·5 claims
- 0486US5719109ALubricating oil compositionEXXON CHEMICAL PATENTS INC·Filed 1994·Granted Feb 17, 1998·45 cites·12 claims
- 0586US5688748ALubricating oil composition for internal combustion enginesTONEN CORP·Filed 1996·Granted Nov 18, 1997·43 cites·7 claims
- 0685US5605880ALubricating oil compositionEXXON CHEMICAL PATENTS INC·Filed 1994·Granted Feb 25, 1997·36 cites·1 claims
- 0784US5364545ALubricating oil composition containing friction modifier and corrosion inhibitorTONEN CORP·Filed 1993·Granted Nov 15, 1994·38 cites·6 claims
- 0878US7517838B2Lubricating oil for bearingNEW JAPAN CHEM CO LTD·Filed 2003·Granted Apr 14, 2009·17 cites·22 claims
- 0978US5259978ATraction fluid composition comprising a cyclohexyl diester and branched poly-α-olefinTOA NENRYO KOGYO KK·Filed 1993·Granted Nov 9, 1993·27 cites·7 claims
- 1074US6855675B1Lubricating oil compositionTONENGENERAL SEKIYU K K·Filed 1995·Granted Feb 15, 2005·31 cites·5 claims
- 1168US5344582ATraction fluid derived from cyclopentadiene oligomersTONEN CORP·Filed 1992·Granted Sep 6, 1994·19 cites·3 claims
- 1267US6403541B1Oil filter clogging preventing agent and oil filter clogging preventing method, and engine oil compositions comprising said oil filter clogging preventing agentNEW JAPAN CHEM CO LTD·Filed 2000·Granted Jun 11, 2002·13 cites·34 claims
- 1365US4889650ASynthetic traction fluidTOA NENRYO KOGYO KK·Filed 1987·Granted Dec 26, 1989·14 cites·8 claims
- 1464US5696063ABasic metal salt of dithiocarbamic acid and lubricating oil composition containing said saltEXXON CHEMICAL PATENTS INC·Filed 1994·Granted Dec 9, 1997·16 cites·6 claims
- 1561US5266229AStable electro-rheological fluid having a high viscosity-increasing effectTONEN CORP·Filed 1991·Granted Nov 30, 1993·16 cites·11 claims
- 1659US5387370AElectroviscous fluidTONEN CORP·Filed 1992·Granted Feb 7, 1995·15 cites·6 claims
- 1757US4886614ASynthetic traction fluidTOA NENRYO KOGYO KK·Filed 1987·Granted Dec 12, 1989·13 cites·11 claims
- 1854US5039440ATraction fluidTOA NENRYO KOGYO KK·Filed 1988·Granted Aug 13, 1991·8 cites·8 claims
- 1949US5880073ALubricating oil compositionTONEN CORP·Filed 1995·Granted Mar 9, 1999·15 cites·3 claims
- 2049US5332515AFluid for viscous couplingTONEN CORP·Filed 1992·Granted Jul 26, 1994·8 cites·7 claims
- 2147US5288535AElectrode for electroviscous fluidTONEN CORP·Filed 1992·Granted Feb 22, 1994·8 cites·10 claims
- 2246US5334319AComposition for hydraulic lubrication and couplingTONEN CORP·Filed 1992·Granted Aug 2, 1994·9 cites·3 claims
- 2346US4978468ATraction fluidTOA NENRYO KOGYO KK·Filed 1989·Granted Dec 18, 1990·8 cites·4 claims
- 2445US4886613ATraction fluidTOA NENRYO KOGYO KK·Filed 1987·Granted Dec 12, 1989·8 cites·10 claims
- 2540US5171481ASynthetic traction fluidTOA NENRYO KOGYO KK·Filed 1992·Granted Dec 15, 1992·4 cites·13 claims
- 2640US5075024ASynthetic traction fluidTOA NENRYO KOGYO KK·Filed 1988·Granted Dec 24, 1991·6 cites·11 claims
- 2739US5266230AElectroviscous fluid containing antioxidant and/or corrosion inhibitorTONEN CORP·Filed 1991·Granted Nov 30, 1993·6 cites·4 claims
- 2837US5334320ACompositions for hydraulic, lubricating and couplingTONEN CORP·Filed 1993·Granted Aug 2, 1994·5 cites·2 claims
- 2930US5603861AElectroviscous fluid mixed with esterified silica fine particles and polyhydric alcoholTONEN CORP·Filed 1994·Granted Feb 18, 1997·2 cites·12 claims
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