Inventor · disambiguated record
Yuji Koyama
Also filed as: KOYAMA YUJI
23 granted patents·28 pending applications·133 citations·filing 1988–2024
94Inventor score
Top patents by PatentIndex Score
51 records- 0194US9127404B2Used paper recycling apparatus and its constituent devicesTAMAI SHIGERU·Filed 2012·Granted Sep 8, 2015·30 cites·5 claims
- 0293US6645318B2Fuel tank made of ferritic stainless steelNIPPON STEEL CORP·Filed 2001·Granted Nov 11, 2003·31 cites·18 claims
- 0391US10260134B2Hot rolled ferritic stainless steel sheet for cold rolling raw materialNIPPON STEEL & SUMIKIN SST·Filed 2015·Granted Apr 16, 2019·3 cites·2 claims
- 0490US8350351B2Semiconductor light receiving deviceSEDI INC·Filed 2010·Granted Jan 8, 2013·8 cites·6 claims
- 0582US6585799B1Cast steel piece and steel product excellent in forming characteristics and method for treatment of molted steel therefor and method for production thereofNIPPON STEEL CORP·Filed 2000·Granted Jul 1, 2003·15 cites·6 claims
- 0681US9523402B2Stainless steel brake disc and method for production thereofNIPPON STEEL & SUMIKIN SST·Filed 2014·Granted Dec 20, 2016·2 cites·4 claims
- 0781US8449722B2Used paper recycling apparatus and its constitutent devicesTAMAI SHIGERU·Filed 2007·Granted May 28, 2013·4 cites·107 claims
- 0877US12487137B2Piezoelectric element, piezoelectric device, and method of manufacturing piezoelectric elementDENSO CORP·Filed 2023·Granted Dec 2, 2025·0 cites·14 claims
- 0977US9556539B2Shrinkable fiber for porous molded bodyES FIBERVISIONS CO LTD·Filed 2013·Granted Jan 31, 2017·3 cites·7 claims
- 1074US6918969B2Cast steel and steel material with excellent workability, method for processing molten steel therefor and method for manufacturing the cast steel and steel materialNIPPON STEEL CORP·Filed 2002·Granted Jul 19, 2005·9 cites·6 claims
- 1170US8273217B2Paper machine for used paper recycling apparatusTAMAI SHIGERU·Filed 2008·Granted Sep 25, 2012·1 cites·14 claims
- 1270US8025770B2Used paper processing apparatusSEED CO LTD·Filed 2006·Granted Sep 27, 2011·1 cites·39 claims
- 1367US8313616B2Used paper recycling apparatus and its constituent devicesTAMAI SHIGERU·Filed 2006·Granted Nov 20, 2012·1 cites·54 claims
- 1464US2024094720A1Facility state monitoring systemDENSO CORP·Filed 2023·Application pending·0 cites
- 1561US8940573B2Method of manufacturing semiconductor light-receiving elementSEDI INC·Filed 2013·Granted Jan 27, 2015·0 cites·12 claims
- 1661US8569853B2Semiconductor light-receiving deviceKOYAMA YUJI·Filed 2012·Granted Oct 29, 2013·0 cites·19 claims
- 1761US8262863B2Paper machine for used paper recycling apparatusTAMAI SHIGERU·Filed 2008·Granted Sep 11, 2012·1 cites·19 claims
- 1861US2015020933A1Heat-resistant cold rolled ferritic stainless steel sheet, hot rolled ferritic stainless steel sheet for cold rolling raw material, and methods for producing sameNIPPON STEEL & SUMIKIN SST·Filed 2013·Application pending·0 cites
- 1960US2022385034A1Vertical-cavity surface-emitting laserSUMITOMO ELECTRIC INDUSTRIES·Filed 2022·Application pending·0 cites
- 2059US9780249B2Semiconductor light-receiving deviceKOYAMA YUJI·Filed 2012·Granted Oct 3, 2017·1 cites·7 claims
- 2157US2024344921A1Failure sign detection system, failure sign detection method, and non-transitory computer-readable mediumDENSO CORP·Filed 2024·Application pending·0 cites
- 2257US2022077655A1Surface-emitting semiconductor laserSUMITOMO ELECTRIC INDUSTRIES·Filed 2021·Application pending·0 cites
- 2356US2010163655A1Beating method of used paper processing apparatus, used paper processing method, beating device of used paper processing apparatus, and used paper processing apparatusTAMAI SHIGERU·Filed 2009·Application pending·0 cites
- 2455US8541859B2Semiconductor light receiving element and method for manufacturing the sameKOYAMA YUJI·Filed 2011·Granted Sep 24, 2013·0 cites·12 claims
- 2555US4981906AHeat and impact resistant thermoplastic resin compositionMONSANTO KASEI KK·Filed 1988·Granted Jan 1, 1991·18 cites·8 claims
- 2655US2023363280A1Piezoelectric element, piezoelectric device, and method for manufacturing piezoelectric elementDENSO CORP·Filed 2023·Application pending·0 cites
- 2754US8343314B2Pulp feeder for used paper recycling apparatusSEED CO LTD·Filed 2008·Granted Jan 1, 2013·0 cites·14 claims
- 2854US2024201044A1Abnormality detection device, abnormality detection system, abnormality detection method, and computer readable mediumDENSO CORP·Filed 2024·Application pending·0 cites
- 2952US2008179029A1Cleaning method and system for used paper recycling apparatusTAMAI SHIGERU·Filed 2008·Application pending·0 cites
- 3052US2022037854A1Vertical cavity surface emitting laserSUMITOMO ELECTRIC INDUSTRIES·Filed 2021·Application pending·0 cites
- 3151US2008173416A1Pulp concentration adjusting method and device for used paper recycling apparatusTAMAI SHIGERU·Filed 2008·Application pending·0 cites
- 3249US8710534B2Semiconductor light-receiving deviceSEDI INC·Filed 2013·Granted Apr 29, 2014·0 cites·12 claims
- 3349US2007267653A1Semiconductor light-receiving deviceEUDYNA DEVICES INC·Filed 2007·Application pending·0 cites
- 3445US10128633B2Surface emitting semiconductor laserSUMITOMO ELECTRIC INDUSTRIES·Filed 2018·Granted Nov 13, 2018·0 cites·8 claims
- 3545US2010227166A1Shrinkable fiber for porous molded bodyES FIBERVISIONS CO LTD·Filed 2008·Application pending·0 cites
- 3645US2008087551A1Method for anodizing aluminum alloy and power supply for anodizing aluminum alloyODAJIMA HIROMICHI·Filed 2007·Application pending·0 cites
- 3744US2012138250A1Pulp making device of used paper recycling apparatus and used paper recycling apparatusTAMAI SHIGERU·Filed 2011·Application pending·0 cites
- 3843US2017253945A1Martensitic stainless steel for brake disk and method for producing said steelNIPPON STEEL & SUMIKIN SST·Filed 2015·Application pending·0 cites
- 3942US2010300636A1Belt meandering preventive device of used paper recycling apparatus, paper making device, and used paper recycling apparatusTAMAI SHIGERU·Filed 2010·Application pending·0 cites
- 4042US2011024070A1Regenerated paper smoothing device of used paper recycling apparatus, paper making device, and used paper recycling apparatusTAMAI SHIGERU·Filed 2010·Application pending·0 cites
- 4141US2010276101A1Paper making device of used paper recycling apparatus and used paper recycling apparatusTAMAI SHIGERU·Filed 2010·Application pending·0 cites
- 4240US5843370AFerritic stainless steel for exhaust system equipment of vehicleNIPPON STEEL CORP·Filed 1997·Granted Dec 1, 1998·5 cites·2 claims
- 4340US2011108220A1Pulp concentration adjusting method of used paper recycling apparatus, pulp concentration adjusting device of used paper recycling apparatus, and used paper recycling apparatusTAMAI SHIGERU·Filed 2010·Application pending·0 cites
- 4440US2011030735A1Cleaning method of used paper recycling apparatus, cleaning system, and used paper recycling apparatusTAMAI SHIGERU·Filed 2010·Application pending·0 cites
- 4540US2010276100A1Dewatering device of used paper recycling apparatus and used paper recycling apparatusTAMAI SHIGERU·Filed 2010·Application pending·0 cites
- 4639US2008179031A1Paper machine for used paper recycling apparatusTAMAI SHIGERU·Filed 2008·Application pending·0 cites
- 4738US2012024490A1Pulp feeder for used paper recycling apparatusTAMAI SHIGERU·Filed 2011·Application pending·0 cites
- 4837US2012012269A1Recycled paper smoothing device for used paper recycling apparatusTAMAI SHIGERU·Filed 2011·Application pending·0 cites
- 4937US2011300377A1Radiation-Curable Adhesive Composition for Optical Component and Adhesive Optical ComponentKOYAMA YUJI·Filed 2010·Application pending·0 cites
- 5036US2010200181A1Pulp manufacturing method of used paper recycling apparatus, pulp manufacturing device of used paper recycling apparatus, and used paper recycling apparatusTAMAI SHIGERU·Filed 2010·Application pending·0 cites
Showing the top 50 of 51 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →