Inventor · disambiguated record
Keiichiro Asai
Also filed as: ASAI KEIICHIRO
47 granted patents·14 pending applications·262 citations·filing 2000–2024
97Inventor score
Files withNGK INSULATORS LTD61
Top patents by PatentIndex Score
61 records- 0197US11262046B2Phosphor element, method for producing same, and lighting deviceNGK INSULATORS LTD·Filed 2021·Granted Mar 1, 2022·4 cites·12 claims
- 0292US10284169B2Bonded bodies and acoustic wave devicesNGK INSULATORS LTD·Filed 2018·Granted May 7, 2019·7 cites·7 claims
- 0392US6426519B1Epitaxial growth substrate and a method for producing the sameNGK INSULATORS LTD·Filed 2000·Granted Jul 30, 2002·59 cites·9 claims
- 0488US6495894B2Photonic device, a substrate for fabricating a photonic device, a method for fabricating the photonic device and a method for manufacturing the photonic device-fabricating substrateNGK INSULATORS LTD·Filed 2001·Granted Dec 17, 2002·49 cites·15 claims
- 0584US11385334B2Optical scanning elementNGK INSULATORS LTD·Filed 2019·Granted Jul 12, 2022·2 cites·11 claims
- 0683US7687824B2Method of improving surface flatness of group-III nitride crystal, substrate for epitaxial growth, and semiconductor deviceNGK INSULATORS LTD·Filed 2005·Granted Mar 30, 2010·8 cites·11 claims
- 0782US7033439B2Apparatus for fabricating a III-V nitride film and a method for fabricating the sameNGK INSULATORS LTD·Filed 2001·Granted Apr 25, 2006·24 cites·4 claims
- 0881US10859747B2Phosphor element and illumination deviceNGK INSULATORS LTD·Filed 2019·Granted Dec 8, 2020·2 cites·13 claims
- 0981US7438761B2Apparatus for fabricating a III-V nitride film and a method for fabricating the sameNGK INSULATORS LTD·Filed 2006·Granted Oct 21, 2008·6 cites·5 claims
- 1079US10720566B2Bonding methodNGK INSULATORS LTD·Filed 2018·Granted Jul 21, 2020·2 cites·6 claims
- 1176US10964882B2Bonding methodNGK INSULATORS LTD·Filed 2018·Granted Mar 30, 2021·2 cites·6 claims
- 1276US6989202B2Method for fabricating a III nitride film, an underlayer for fabricating a III nitride film and a method for fabricating the same underlayerNGK INSULATORS LTD·Filed 2004·Granted Jan 24, 2006·13 cites·5 claims
- 1376US6869702B2Substrate for epitaxial growthNGK INSULATORS LTD·Filed 2003·Granted Mar 22, 2005·17 cites·10 claims
- 1474US9859684B2Grating element and external-resonator-type light emitting deviceNGK INSULATORS LTD·Filed 2016·Granted Jan 2, 2018·2 cites·9 claims
- 1572US6649493B2Method for fabricating a III nitride film, and underlayer for fabricating a III nitride film and a method for fabricating the same underlayerNGK INSULATORS LTD·Filed 2001·Granted Nov 18, 2003·11 cites·11 claims
- 1668US6770914B2III nitride semiconductor substrate for ELONGK INSULATORS LTD·Filed 2002·Granted Aug 3, 2004·11 cites·15 claims
- 1765US12436442B2Waveguide device, optical scanning device and optical modulation deviceNGK INSULATORS LTD·Filed 2024·Granted Oct 7, 2025·0 cites·8 claims
- 1864US12436336B2Optical scanning elementNGK INSULATORS LTD·Filed 2022·Granted Oct 7, 2025·0 cites·7 claims
- 1963US12212301B2Composite substrate and surface acoustic wave elementNGK INSULATORS LTD·Filed 2022·Granted Jan 28, 2025·0 cites·9 claims
- 2063US11569434B2Vibrating plate-bonded-bodyNGK INSULATORS LTD·Filed 2021·Granted Jan 31, 2023·0 cites·7 claims
- 2163US6597023B2Semiconductor light-detecting elementNGK INSULATORS LTD·Filed 2002·Granted Jul 22, 2003·8 cites·13 claims
- 2262US12411367B2Composite substrate for electro-optical elementNGK INSULATORS LTD·Filed 2022·Granted Sep 9, 2025·0 cites·14 claims
- 2362US6765244B2III nitride film and a III nitride multilayerNGK INSULATORS LTD·Filed 2002·Granted Jul 20, 2004·7 cites·12 claims
- 2460US12140304B2Phosphor element with heat dissipating substrate that has thermally conductive metal plating filmNGK INSULATORS LTD·Filed 2021·Granted Nov 12, 2024·0 cites·8 claims
- 2560US11635189B2Phosphor element and lighting deviceNGK INSULATORS LTD·Filed 2022·Granted Apr 25, 2023·0 cites·9 claims
- 2660US9298025B2Electrode structure for an optical waveguide substrateNGK INSULATORS LTD·Filed 2014·Granted Mar 29, 2016·0 cites·6 claims
- 2760US6554896B1Epitaxial growth substrate and a method for producing the sameNGK INSULATORS LTD·Filed 2000·Granted Apr 29, 2003·7 cites·10 claims
- 2860US2024405743A1Composite substrate, surface acoustic wave element, and method for manufacturing composite substrateNGK INSULATORS LTD·Filed 2024·Application pending·0 cites
- 2959US6703649B2Semiconductor elementNGK INSULATORS LTD·Filed 2002·Granted Mar 9, 2004·6 cites·15 claims
- 3057US12166465B2Bonded body and acoustic wave elementNGK INSULATORS LTD·Filed 2022·Granted Dec 10, 2024·0 cites·11 claims
- 3156US2019309936A1Optical componentNGK INSULATORS LTD·Filed 2019·Application pending·0 cites
- 3256US2023411818A1Waveguide elementNGK INSULATORS LTD·Filed 2023·Application pending·0 cites
- 3356US2023112992A1Photonic crystal elementNGK INSULATORS LTD·Filed 2022·Application pending·0 cites
- 3456US2023378933A1Composite substrate, surface acoustic wave element, and method of producing composite substrateNGK INSULATORS LTD·Filed 2023·Application pending·0 cites
- 3555US11112086B2Phosphor element and lighting deviceNGK INSULATORS LTD·Filed 2018·Granted Sep 7, 2021·0 cites·5 claims
- 3655US10564513B2Optical waveguide devicesNGK INSULATORS LTD·Filed 2014·Granted Feb 18, 2020·0 cites·17 claims
- 3755US6706620B2Method for fabricating a nitride filmNGK INSULATORS LTD·Filed 2002·Granted Mar 16, 2004·4 cites·10 claims
- 3855US6492191B2Method for manufacturing an A1xGayInzN film using a metal film for heat radiationNGK INSULATORS LTD·Filed 2001·Granted Dec 10, 2002·5 cites·5 claims
- 3955US2023061055A1Composite substrate for photonic crystal element, and photonic crystal elementNGK INSULATORS LTD·Filed 2022·Application pending·0 cites
- 4054US6727164B2Method for fabricating a semiconducting nitride film, susceptor tray, and apparatus for fabricating a semiconducting nitride filmNGK INSULATORS LTD·Filed 2002·Granted Apr 27, 2004·1 cites·7 claims
- 4153US6703255B2Method for fabricating a III nitride filmNGK INSULATORS LTD·Filed 2002·Granted Mar 9, 2004·3 cites·17 claims
- 4253US2022329230A1Piezoelectric vibrating substrate and piezoelectric vibrating elementNGK INSULATORS LTD·Filed 2022·Application pending·0 cites
- 4352US10746926B2Optical waveguide substrateNGK INSULATORS LTD·Filed 2018·Granted Aug 18, 2020·0 cites·13 claims
- 4451US11632093B2Acoustic wave devices and a method of producing the sameNGK INSULATORS LTD·Filed 2019·Granted Apr 18, 2023·0 cites·6 claims
- 4550US10720746B2Optical element and method for manufacturing optical elementNGK INSULATORS LTD·Filed 2019·Granted Jul 21, 2020·0 cites·26 claims
- 4650US9874694B2Production method for mounting structure for grating elementsNGK INSULATORS LTD·Filed 2016·Granted Jan 23, 2018·0 cites·10 claims
- 4749US10393931B2Grating elementNGK INSULATORS LTD·Filed 2017·Granted Aug 27, 2019·0 cites·7 claims
- 4847US11456720B2Bonded body with piezoelectric monocrystalline substrate and supporting substrateNGK INSULATORS LTD·Filed 2019·Granted Sep 27, 2022·0 cites·7 claims
- 4947US7067847B2Semiconductor elementNGK INSULATORS LTD·Filed 2001·Granted Jun 27, 2006·1 cites·13 claims
- 5047US6844611B2III nitride epitaxial substrate, epitaxial substrate for III nitride element, and III nitride element that includes a surface nitride layer formed on the main surface of a sapphire single crystalNGK INSULATORS LTD·Filed 2002·Granted Jan 18, 2005·1 cites·13 claims
Showing the top 50 of 61 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →