Inventor · disambiguated record
Tatsuya Kumagai
Also filed as: KUMAGAI TATSUYA
21 granted patents·5 pending applications·183 citations·filing 1987–2019
94Inventor score
Top patents by PatentIndex Score
26 records- 0187US9770789B2Flux-cored wire for gas-shielded arc welding, method for welding steel for very low temperature use, and method for manufacturing weld jointNIPPON STEEL & SUMITOMO METAL CORP·Filed 2014·Granted Sep 26, 2017·8 cites·12 claims
- 0283US10946486B2Flux-cored wire, manufacturing method of welded joint, and welded jointNIPPON STEEL & SUMITOMO METAL CORP·Filed 2016·Granted Mar 16, 2021·2 cites·20 claims
- 0383US7992440B2Optical fiber vibration sensorHITACHI CABLE·Filed 2008·Granted Aug 9, 2011·15 cites·18 claims
- 0474US5062905AMethod of producing non-oriented magnetic steel plate having high magnetic flux densityNIPPON STEEL CORP·Filed 1990·Granted Nov 5, 1991·18 cites·10 claims
- 0572US5208652AAn improved optical branching/coupling unit for an optical fiber gyroscope, and navigation system employing the sameHITACHI LTD·Filed 1991·Granted May 4, 1993·36 cites·26 claims
- 0666US8097099B2High toughness abrasion resistant steel with little change in hardness during use and method of production of sameSAITOH NAOKI·Filed 2006·Granted Jan 17, 2012·2 cites·8 claims
- 0764US8500924B2High-strength steel plate and producing method thereforKUMAGAI TATSUYA·Filed 2009·Granted Aug 6, 2013·1 cites·7 claims
- 0859US5471301AOptical fiber gyroHITACHI CABLE·Filed 1994·Granted Nov 28, 1995·25 cites·5 claims
- 0957US5701177AMethod for detecting fault of optical fiber gyro and apparatus for diagnosing fault of the sameHITACHI CABLE·Filed 1997·Granted Dec 23, 1997·27 cites·14 claims
- 1056US4950336AMethod of producing non-oriented magnetic steel heavy plate having high magnetic flux densityNIPPON STEEL CORP·Filed 1989·Granted Aug 21, 1990·9 cites·11 claims
- 1154US11572943B2Housing member for power transmission deviceJATCO LTD·Filed 2019·Granted Feb 7, 2023·0 cites·11 claims
- 1253US8216400B2High-strength steel plate and producing method thereforKUMAGAI TATSUYA·Filed 2009·Granted Jul 10, 2012·0 cites·7 claims
- 1352US11858352B2VehicleJATCO LTD·Filed 2019·Granted Jan 2, 2024·0 cites·4 claims
- 1450US5264914AInterference sensor and method utilizing extracted alliasing frequency componentsHITACHI LTD·Filed 1993·Granted Nov 23, 1993·15 cites·16 claims
- 1547US4818047APolarized wave preserving fiberHITACHI CABLE·Filed 1987·Granted Apr 4, 1989·13 cites·7 claims
- 1646US2010139820A1Wear-resistant steel plate having excellent wear resistance at high temperatures and excellent bending workability and method for manufacturing the sameKUMAGAI TATSUYA·Filed 2009·Application pending·0 cites
- 1745US2006016526A1High-strength steel for welded structures excellent in high temperature strength and method of production of the sameMIZUTANI YASUSHI·Filed 2005·Application pending·0 cites
- 1844US11331742B2Flux-cored wire, manufacturing method of welded joint, and welded jointNIPPON STEEL & SUMITOMO METAL CORP·Filed 2016·Granted May 17, 2022·0 cites·18 claims
- 1944US8246768B2High-tensile steel plate of low acoustic anisotropy and high weldability having yield stress of 450 MPa or greater and tensile strength of 570 MPa or greater, and process for producing the sameHOSHINO MANABU·Filed 2006·Granted Aug 21, 2012·0 cites·8 claims
- 2041US2006065335A1High tensile steel excellent in high temperature strength and method for production thereofMIZUTANI YASUSHI·Filed 2003·Application pending·0 cites
- 2141US2012224169A1Optical fiber vibration sensorKUMAGAI TATSUYA·Filed 2012·Application pending·0 cites
- 2240US8730481B2Sagnac optical ingredient-measuring apparatus with circular polarizers in parallelKUMAGAI TATSUYA·Filed 2012·Granted May 20, 2014·0 cites·4 claims
- 2338US2008295920A1High Tension Steel Plate with Small Acoustic Anisotropy and with Excellent Weldability and Method of Production of SameKUMAGAI TATSUYA·Filed 2005·Application pending·0 cites
- 2433US5608525APhase adjustable optical fiber gyro using both even order harmonics and an orthogonal component of an even-order harmonicHITACHI CABLE·Filed 1995·Granted Mar 4, 1997·6 cites·7 claims
- 2533US5555235AOptical fiber gyro with memory storing data measured under application of angular velocityHITACHI CABLE·Filed 1994·Granted Sep 10, 1996·4 cites·5 claims
- 2631US5396327AFiber-optic gyroscope having angular velocity correctionHITACHI CABLE·Filed 1992·Granted Mar 7, 1995·2 cites·13 claims
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