Inventor · disambiguated record
Koji Katayama
Also filed as: KATAYAMA KOJI
116 granted patents·29 pending applications·1,816 citations·filing 1988–2025
99Inventor score
Files withSUMITOMO ELECTRIC INDUSTRIES27TOSOH CORP14YOSHIZUMI YUSUKE11CANON KK9MITSUBISHI ELECTRIC CORP9
Top patents by PatentIndex Score
145 records- 0197US8022502B2Nonvolatile memory element, manufacturing method thereof, and nonvolatile semiconductor apparatus using the nonvolatile memory elementPANASONIC CORP·Filed 2008·Granted Sep 20, 2011·60 cites·23 claims
- 0297US7933303B2Group-III nitride semiconductor laser device, and method for fabricating group-III nitride semiconductor laser deviceSUMITOMO ELECTRIC INDUSTRIES·Filed 2010·Granted Apr 26, 2011·30 cites·20 claims
- 0396US8076167B2Group-III nitride semiconductor laser device, and method for fabricating group-III nitride semiconductor laser deviceTAKAGI SHIMPEI·Filed 2010·Granted Dec 13, 2011·22 cites·7 claims
- 0495US8848421B2Forming method of performing forming on variable resistance nonvolatile memory element, and variable resistance nonvolatile memory deviceKAWAI KEN·Filed 2011·Granted Sep 30, 2014·29 cites·25 claims
- 0595US8105857B2Method of fabricating group-III nitride semiconductor laser deviceTAKAGI SHIMPEI·Filed 2010·Granted Jan 31, 2012·25 cites·19 claims
- 0695US8071405B2Group-III nitride semiconductor laser device, and method for fabricating group-III nitride semiconductor laser deviceTAKAGI SHIMPEI·Filed 2010·Granted Dec 6, 2011·20 cites·2 claims
- 0795US6337536B1White color light emitting diode and neutral color light emitting diodeSUMITOMO ELECTRIC INDUSTRIES·Filed 1999·Granted Jan 8, 2002·229 cites·19 claims
- 0894US8227277B2Group-III nitride semiconductor laser device, and method of fabricating group-III nitride semiconductor laser deviceYOSHIZUMI YUSUKE·Filed 2011·Granted Jul 24, 2012·15 cites·9 claims
- 0993US8389312B2Group-III nitride semiconductor laser device, and method of fabricating group-III nitride semiconductor laser deviceYOSHIZUMI YUSUKE·Filed 2012·Granted Mar 5, 2013·13 cites·8 claims
- 1093US8265113B2Group-III nitride semiconductor laser device, and method of fabricating group-III nitride semiconductor laser deviceYOSHIZUMI YUSUKE·Filed 2010·Granted Sep 11, 2012·14 cites·18 claims
- 1193US8175129B2Group-III nitride semiconductor laser device, method of fabricating group-III nitride semiconductor laser device, and method of estimating damage from formation of scribe grooveYOSHIZUMI YUSUKE·Filed 2010·Granted May 8, 2012·14 cites·23 claims
- 1293US8139619B2Group-III nitride semiconductor laser device, and method for fabricating group-III nitride semiconductor laser deviceTAKAGI SHIMPEI·Filed 2011·Granted Mar 20, 2012·13 cites·11 claims
- 1392US12158459B2Hydrogen sensor, hydrogen detection method, and hydrogen detection deviceNUVOTON TECHNOLOGY CORP JAPAN·Filed 2022·Granted Dec 3, 2024·1 cites·13 claims
- 1492US8902629B2Forming method of performing forming on variable resistance nonvolatile memory element, and variable resistance nonvolatile memory deviceKAWAI KEN·Filed 2011·Granted Dec 2, 2014·18 cites·21 claims
- 1592US8565004B2Nonvolatile memory device and method for programming the sameIIJIMA MITSUTERU·Filed 2011·Granted Oct 22, 2013·22 cites·10 claims
- 1692US8445319B2Nonvolatile memory element, manufacturing method thereof, and nonvolatile semiconductor apparatus using the nonvolatile memory elementKANZAWA YOSHIHIKO·Filed 2011·Granted May 21, 2013·15 cites·4 claims
- 1792US8401048B2Group-III nitride semiconductor laser device, and method of fabricating group-III nitride semiconductor laser deviceTAKAGI SHIMPEI·Filed 2010·Granted Mar 19, 2013·12 cites·19 claims
- 1892US8306082B2Group-III nitride semiconductor laser device, and method of fabricating group-III nitride semiconductor laser deviceYOSHIZUMI YUSUKE·Filed 2010·Granted Nov 6, 2012·12 cites·16 claims
- 1992US8213475B2Group-III nitride semiconductor laser device, and method for fabricating group-III nitride semiconductor laser deviceTAKAGI SHIMPEI·Filed 2011·Granted Jul 3, 2012·12 cites·15 claims
- 2092US6597016B1Semiconductor device and method for fabricating the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Jul 22, 2003·53 cites·11 claims
- 2191US6399993B1Semiconductor device and method for fabricating the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Jun 4, 2002·67 cites·10 claims
- 2290US10281420B2Gas-detecting apparatus including gas sensor and method of detecting hydrogen using gas sensorPANASONIC IP MAN CO LTD·Filed 2017·Granted May 7, 2019·4 cites·19 claims
- 2390US8361885B2Group-III nitride semiconductor laser device, method of fabricating group-III nitride semiconductor laser device, and method of estimating damage from formation of scribe grooveSUMITOMO ELECTRIC INDUSTRIES·Filed 2011·Granted Jan 29, 2013·9 cites·13 claims
- 2490US6455364B1Semiconductor device and method for fabricating the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Sep 24, 2002·55 cites·12 claims
- 2588US6506469B2Surface-side reproduction type optical recording mediumTOSOH CORP·Filed 2001·Granted Jan 14, 2003·25 cites·28 claims
- 2687US8546163B2Group-III nitride semiconductor laser device, and method for fabricating group-III nitride semiconductor laser deviceYOSHIZUMI YUSUKE·Filed 2011·Granted Oct 1, 2013·6 cites·10 claims
- 2786US10725400B2Developer supply container and developer supplying systemCANON KK·Filed 2019·Granted Jul 28, 2020·1 cites·10 claims
- 2886US8957399B2Nonvolatile memory element and nonvolatile memory devicePANASONIC IP MAN CO LTD·Filed 2012·Granted Feb 17, 2015·10 cites·14 claims
- 2986US8741674B2Group-III nitride semiconductor laser device, and method for fabricating group-III nitride semiconductor laser deviceYOSHIZUMI YUSUKE·Filed 2011·Granted Jun 3, 2014·6 cites·10 claims
- 3086US6403976B1Semiconductor crystal, fabrication method thereof, and semiconductor deviceMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Jun 11, 2002·37 cites·4 claims
- 3185US8420419B2Group-III nitride semiconductor laser device, and method for fabricating group-III nitride semiconductor laser deviceTAKAGI SHIMPEI·Filed 2012·Granted Apr 16, 2013·5 cites·11 claims
- 3285US8264865B2Nonvolatile memory element, manufacturing method thereof, and nonvolatile semiconductor device incorporating nonvolatile memory elementMITANI SATORU·Filed 2009·Granted Sep 11, 2012·15 cites·25 claims
- 3385US6224160B1Body supporting apparatusITOKI CREBIO CORP·Filed 1998·Granted May 1, 2001·79 cites·17 claims
- 3483US8279658B2Method of programming variable resistance element and nonvolatile storage deviceMURAOKA SHUNSAKU·Filed 2010·Granted Oct 2, 2012·8 cites·9 claims
- 3583US2025216805A1Developer supply container and developer supplying systemCANON KK·Filed 2025·Application pending·0 cites
- 3682US5001379ASmall-sized electric motorMITSUBISHI ELECTRIC CORP·Filed 1989·Granted Mar 19, 1991·45 cites·8 claims
- 3782US4866317ASmall electric motorMITSUBISHI ELECTRIC CORP·Filed 1988·Granted Sep 12, 1989·45 cites·4 claims
- 3882US2024329593A1Developer supply container and developer supplying systemCANON KK·Filed 2024·Application pending·0 cites
- 3981US11852991B2Developer supply container and developer supplying systemCANON KK·Filed 2022·Granted Dec 26, 2023·0 cites·16 claims
- 4081US11599042B1Developer supply container and developer supplying systemCANON KK·Filed 2022·Granted Mar 7, 2023·0 cites·22 claims
- 4181US8524173B2Microchannel structure and fine-particle production method using the sameYAMANAKA MAHO·Filed 2007·Granted Sep 3, 2013·20 cites·15 claims
- 4281US8309946B2Resistance variable elementMITANI SATORU·Filed 2009·Granted Nov 13, 2012·7 cites·7 claims
- 4381US7641871B2Fine channel device and a chemically operating method for fluid using the deviceTOSOH CORP·Filed 2003·Granted Jan 5, 2010·27 cites·26 claims
- 4481US7423284B2Light emitting device, method for making the same, and nitride semiconductor substrateSUMITOMO ELECTRIC INDUSTRIES·Filed 2006·Granted Sep 9, 2008·10 cites·4 claims
- 4581US7190004B2Light emitting deviceSUMITOMO ELECTRIC INDUSTRIES·Filed 2004·Granted Mar 13, 2007·32 cites·162 claims
- 4680US8507305B2Group-III nitride semiconductor laser device, method of fabricating group-III nitride semiconductor laser device, and epitaxial substrateYOSHIZUMI YUSUKE·Filed 2012·Granted Aug 13, 2013·4 cites·16 claims
- 4780US8395930B2Method of programming variable resistance element and nonvolatile storage deviceMURAOKA SHUNSAKU·Filed 2012·Granted Mar 12, 2013·6 cites·9 claims
- 4879US6903374B2Structure of p-electrode at the light-emerging side of light-emitting diodeSUMITOMO ELECTRIC INDUSTRIES·Filed 2003·Granted Jun 7, 2005·32 cites·10 claims
- 4978US9251898B2Method for programming nonvolatile memory element, method for initializing nonvolatile memory element, and nonvolatile memory deviceKATAYAMA KOJI·Filed 2012·Granted Feb 2, 2016·5 cites·17 claims
- 5078US8675393B2Method for driving non-volatile memory element, and non-volatile memory deviceKATAYAMA KOJI·Filed 2011·Granted Mar 18, 2014·7 cites·14 claims
Showing the top 50 of 145 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →