Inventor · disambiguated record
Tohru Koyama
Also filed as: KOYAMA TOHRU
29 granted patents·6 pending applications·570 citations·filing 1977–2006
97Inventor score
Files withHITACHI LTD12MITSUBISHI ELECTRIC CORP9RENESAS TECH CORP8HITACHI CHEMICAL CO LTD3HITACHI MAXELL1
Top patents by PatentIndex Score
35 records- 0190US5324767AThermosetting resin composition for casting high-voltage coil, and molded coil and panel formed by casting and curing the compositionHITACHI LTD·Filed 1992·Granted Jun 28, 1994·44 cites·43 claims
- 0284US5982056AThermosetting resin composition, electrically insulated coil, electric rotating machine and method for producing sameHITACHI LTD·Filed 1997·Granted Nov 9, 1999·80 cites·16 claims
- 0383US7279244B2Fuel cell, polyelectrolyte and ion-exchange resin use for sameHITACHI LTD·Filed 2005·Granted Oct 9, 2007·5 cites·5 claims
- 0480US5844850AApparatus for analyzing a failure in a semiconductor wafer and method thereofMITSUBISHI ELECTRIC CORP·Filed 1996·Granted Dec 1, 1998·70 cites·8 claims
- 0579US6614049B1System LSI chip having a logic part and a memory partMITSUBISHI ELECTRIC CORP·Filed 2000·Granted Sep 2, 2003·27 cites·4 claims
- 0679US5708371AScanning photoinduced current analyzer capable of detecting photoinduced current in nonbiased specimenMITSUBISHI ELECTRIC CORP·Filed 1995·Granted Jan 13, 1998·45 cites·8 claims
- 0774US6678623B2Failure analysis device and failure analysis methodRENESAS TECH CORP·Filed 2001·Granted Jan 13, 2004·16 cites·16 claims
- 0874US5952837AScanning photoinduced current analyzer capable of detecting photoinduced current in nonbiased specimenMITSUBISHI ELECTRIC CORP·Filed 1997·Granted Sep 14, 1999·36 cites·6 claims
- 0973US6893764B2Solid polyelectrolyte, assembly of membrane and electrodes, and fuel cellHITACHI LTD·Filed 2002·Granted May 17, 2005·11 cites·10 claims
- 1073US5760892AMethod of analyzing failure of semiconductor device by using emission microscope and system for analyzing failure of semiconductor deviceMITSUBISHI ELECTRIC CORP·Filed 1996·Granted Jun 2, 1998·43 cites·9 claims
- 1171US7425383B2Electrode for polymer electrolyte fuel cell, separator therefore, and polymer electrolyte fuel cell, and generating system using themHITACHI LTD·Filed 2006·Granted Sep 16, 2008·1 cites·6 claims
- 1271US6009545ASystem for analyzing a failure in a semiconductor wafer by calculating correlation coefficient between collated data of defects per prescribed unit and failures per prescribed unitMITSUBISHI ELECTRIC CORP·Filed 1998·Granted Dec 28, 1999·45 cites·9 claims
- 1365US6989212B2Fuel cell, polyelectrolyte and ion-exchange resin used for sameHITACHI LTD·Filed 2002·Granted Jan 24, 2006·5 cites·3 claims
- 1465US5177569ASemiconductor device having a two layered structure gate electrodeMITSUBISHI ELECTRIC CORP·Filed 1991·Granted Jan 5, 1993·40 cites·11 claims
- 1563US7022743B2Fuel cell, polyelectrolyte and ion-exchange resin used for sameHITACHI LTD·Filed 2002·Granted Apr 4, 2006·4 cites·9 claims
- 1663US6677760B1Method of and apparatus for analyzing failureRENESAS TECH CORP·Filed 2000·Granted Jan 13, 2004·10 cites·24 claims
- 1759US4448940AThermosetting resin composition and prepolymer thereofHITACHI LTD·Filed 1982·Granted May 15, 1984·12 cites·16 claims
- 1855US5381032ASemiconductor device having a gate electrode of polycrystal layer and a method of manufacturing thereofMITSUBISHI ELECTRIC CORP·Filed 1993·Granted Jan 10, 1995·26 cites·1 claims
- 1955US4129554AThermosettable, polymerizable resin composition comprising a polyepoxide and a polyisocyanate stabilized by incorporating an organic electron acceptorHITACHI CHEMICAL CO LTD·Filed 1977·Granted Dec 12, 1978·9 cites·28 claims
- 2051US7659028B2Polymer electrolyte fuel cellHITACHI LTD·Filed 2004·Granted Feb 9, 2010·0 cites·9 claims
- 2151US7541107B2Solid polyelectrolyte, assembly of membrane and electrodes, amd fuel cellHITACHI LTD·Filed 2004·Granted Jun 2, 2009·0 cites·18 claims
- 2250US6745618B2Scanning probe microscopeRENESAS TECH CORP·Filed 2002·Granted Jun 8, 2004·6 cites·1 claims
- 2346US2003082429A1Electrode for polymer electrolyte fuel cell, separator therefor, and polymer electrolyte fuel cell and generating system using themFiled 2002·Application pending·0 cites
- 2444US2005074656A1Fuel cell, electronic appliance and business methodHITACHI MAXELL·Filed 2004·Application pending·0 cites
- 2542US4297471AOdorless or low-odor crosslinkable compound and resin composition containing the sameHITACHI CHEMICAL CO LTD·Filed 1980·Granted Oct 27, 1981·3 cites·10 claims
- 2639US6838340B2Method of manufacturing semiconductor device having MIM capacitor elementRENESAS TECH CORP·Filed 2003·Granted Jan 4, 2005·0 cites·2 claims
- 2739US5166283APolymer having dihydropyridine rings or dihydrotriazine rings, process for producing the same, and applications thereofHITACHI LTD·Filed 1991·Granted Nov 24, 1992·3 cites·12 claims
- 2839US2004188789A1Semiconductor device and method for machining a semiconductor substrateRENESAS TECH CORP·Filed 2003·Application pending·0 cites
- 2939US2004203257A1Processing method of semiconductor substrateRENESAS TECH CORP·Filed 2003·Application pending·0 cites
- 3038US5221630AMethod of manufacturing semiconductor device having a two layered structure gate electrodeMITSUBISHI ELECTRIC CORP·Filed 1992·Granted Jun 22, 1993·11 cites·6 claims
- 3138US4369288AOdorless or low-odor crosslinkable compound and resin composition containing the sameHITACHI CHEMICAL CO LTD·Filed 1981·Granted Jan 18, 1983·2 cites·8 claims
- 3236US2004212380A1Failure analyzerRENESAS TECH CORP·Filed 2004·Application pending·0 cites
- 3335US5075159AElectrically insulated coilKOYAMA TOHRU·Filed 1990·Granted Dec 24, 1991·12 cites·8 claims
- 3435US2004103353A1Failure analysis methodRENESAS TECH CORP·Filed 2003·Application pending·0 cites
- 3534US5733402AMethod for producing electrically insulated coilsHITACHI LTD·Filed 1996·Granted Mar 31, 1998·4 cites·24 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →