Inventor
SAKAI MASAHIRO
JP72 patents
⚠️ This page may combine multiple inventors who share the name “SAKAI MASAHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NGK INSULATORS LTD
17 patentsUS7965015B2Jun 21, 2011
Lamb wave device
NGK INSULATORS LTD151 citations96
US7598826B2Oct 6, 2009
Piezoelectric thin film device having a drive section with a weighted portion
NGK INSULATORS LTD11 citations84
US8795431B2Aug 5, 2014
Method for producing gallium nitride layer and seed crystal substrate used in same
NGK INSULATORS LTD7 citations81
US11309455B2Apr 19, 2022
Group 13 element nitride layer, free-standing substrate and functional element
NGK INSULATORS LTD2 citations73
US9090988B2Jul 28, 2015
Method of producing crystals of nitrides of group 13 elements and melt compositions
NGK INSULATORS LTD4 citations73
US7825417B2Nov 2, 2010
Epitaxial wafers, method for manufacturing of epitaxial wafers, method of suppressing bowing of these epitaxial wafers and semiconductor multilayer structures using these epitaxial wafers
NGK INSULATORS LTD6 citations73
US12564023B2Feb 24, 2026
Free-standing substrate for epitaxial crystal growth, and functional element
NGK INSULATORS LTD0 citations63
US11862689B2Jan 2, 2024
Group-III element nitride semiconductor substrate
NGK INSULATORS LTD0 citations63
US10192738B2Jan 29, 2019
Methods of producing seed crystal substrates and group 13 element nitride crystals, and seed crystal substrates
NGK INSULATORS LTD1 citations63
US7135347B2Nov 14, 2006
Method for manufacturing nitride film including high-resistivity GaN layer and epitaxial substrate manufactured by the method
NGK INSULATORS LTD2 citations63
US11611017B2Mar 21, 2023
Group 13 element nitride layer, free-standing substrate and functional element
NGK INSULATORS LTD1 citations62
US11088299B2Aug 10, 2021
Group 13 element nitride layer, free-standing substrate and functional element
NGK INSULATORS LTD1 citations62
US11011678B2May 18, 2021
Group 13 element nitride layer, free-standing substrate and functional element
NGK INSULATORS LTD1 citations62
US7479658B2Jan 20, 2009
Epitaxial wafers, method for manufacturing of epitaxial wafers, method of suppressing bowing of these epitaxial wafers and semiconductor multilayer structures using these epitaxial wafers
NGK INSULATORS LTD2 citations62
US11437233B2Sep 6, 2022
Base substrate, functional element, and method for manufacturing base substrate
NGK INSULATORS LTD1 citations61
US11245054B2Feb 8, 2022
Base substrate, functional element, and production method for base substrate
NGK INSULATORS LTD0 citations61
US12057307B2Aug 6, 2024
Group-III element nitride semiconductor substrate
NGK INSULATORS LTD0 citations59
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD
9 patentsUS5869846AFeb 9, 1999
Superconducting junction device
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD56 citations96
US6178339B1Jan 23, 2001
Wireless communication filter operating at low temperature
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD20 citations92
US7270774B2Sep 18, 2007
Phosphor having resistance to deterioration caused by ultraviolet rays, and gas discharge display device of which image quality is not readily deteriorated over time
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD6 citations74
US6524958B2Feb 25, 2003
Method of forming channel in thin film transistor using non-ionic excited species
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD10 citations74
US5885937AMar 23, 1999
Superconducting tunnel junction element and superconducting device
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD6 citations63
US5856204AJan 5, 1999
Tunnel-type Josephson element and method for manufacturing the same
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD5 citations63
US7238303B2Jul 3, 2007
Phosphor and plasma display device
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD3 citations62
US7153451B2Dec 26, 2006
Phosphors and related manufacturing method, display device, and fluorescent lamp
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD2 citations62
US5731270AMar 24, 1998
Oxide superconductor and method and apparatus for fabricating the same
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD3 citations62
SHARP KK
6 patentsUS6308018B1Oct 23, 2001
Image forming apparatus
SHARP KK18 citations84
US7587154B2Sep 8, 2009
Developing unit and image forming apparatus using the same
SHARP KK10 citations83
US6678482B2Jan 13, 2004
Image forming apparatus and method for determining suitability of replaceable component
SHARP KK14 citations83
US7687216B2Mar 30, 2010
Two-component developer and two-component developing apparatus using the same
SHARP KK13 citations80
US6459867B2Oct 1, 2002
Developing apparatus
SHARP KK13 citations74
US6339686B2Jan 15, 2002
Developer unit with cleaning element
SHARP KK13 citations72
TOYO BOSEKI
3 patentsTOSHIBA KK
2 patentsPANASONIC CORP
2 patentsSHINETSU HANDOTAI KK
1 patentRENESAS TECH CORP
1 patentMITSUBISHI ELECTRIC CORP
1 patentPANASONIC IP MAN CO LTD
1 patentYOKOGAWA ELECTRIC CORP
1 patentKUROSAKI REFRACTORIES CO
1 patentRENESAS ELECTRONICS CORP
1 patentYAMAUCHI YASUHIRO
1 patentIMAI TAKEO
1 patentNTT DOCOMO INC
1 patentSAKAI MASAHIRO
1 patentShowing the top 50 of 72 patents by PatentIndex Score.