Inventor
YAMAGUCHI HIROFUMI
JP83 patents
⚠️ This page may combine multiple inventors who share the name “YAMAGUCHI HIROFUMI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NGK INSULATORS LTD
40 patentsUS5232765AAug 3, 1993
Distributed constant circuit board using ceramic substrate material
NGK INSULATORS LTD186 citations99
US7723909B2May 25, 2010
Electron emitter formed of a dielectric material characterized by having high mechanical quality factor
NGK INSULATORS LTD24 citations93
US6495945B2Dec 17, 2002
Piezoelectric/electrostrictive element
NGK INSULATORS LTD33 citations93
US7126255B2Oct 24, 2006
Piezoelectric/electrostrictive film-type device
NGK INSULATORS LTD22 citations91
US7576477B2Aug 18, 2009
Piezoelectric/electrostrictive porcelain composition and method of manufacturing the same
NGK INSULATORS LTD17 citations84
US7477004B2Jan 13, 2009
Piezoelectric/electrostrictive porcelain composition, piezoelectric/electrostrictive article, and piezoelectric/electrostrictive film type element
NGK INSULATORS LTD8 citations84
US7221075B2May 22, 2007
Piezoelectric/electrostrictive device
NGK INSULATORS LTD10 citations84
US6541895B2Apr 1, 2003
Piezoelectric/electrostrictive film element
NGK INSULATORS LTD14 citations84
US7911117B2Mar 22, 2011
Piezoelectric/electrostrictive body, and piezoelectric/electrostrictive element
NGK INSULATORS LTD7 citations83
US7893601B2Feb 22, 2011
(Li, Na, K)(Nb, Ta) O3 based piezoelectric material
NGK INSULATORS LTD9 citations83
US7332851B2Feb 19, 2008
Piezoelectric/electrostrictive film type device and method of manufacturing the same
NGK INSULATORS LTD7 citations74
US7183694B2Feb 27, 2007
Piezoelectric/electrostrictive device
NGK INSULATORS LTD7 citations74
US6919667B2Jul 19, 2005
Piezoelectric/electrostrictive film device
NGK INSULATORS LTD9 citations74
US6531070B1Mar 11, 2003
Piezoelectric body
NGK INSULATORS LTD10 citations74
US5556585ASep 17, 1996
Dielectric ceramic body including TIO2 dispersion in crystallized cordierite matrix phase, method of producing the same, and circuit board using the same
NGK INSULATORS LTD7 citations74
US5262595ANov 16, 1993
Dielectric ceramic body including TiO2 dispersion in crystallized cordierite matrix phase, method of producing the same, and circuit board using the same
NGK INSULATORS LTD12 citations74
US9012786B2Apr 21, 2015
Circuit board for high-capacity modules, and a production method of the circuit board
NGK INSULATORS LTD4 citations73
US9212087B2Dec 15, 2015
Glass-ceramics composite material
NGK INSULATORS LTD5 citations72
US7901729B2Mar 8, 2011
Method of manufacturing a piezoelectric/electrostrictive device
NGK INSULATORS LTD5 citations72
US12559425B2Feb 24, 2026
Ceramic body and method for producing same, heater element, heater unit, heater system as well as purification system
NGK INSULATORS LTD0 citations63
US9247633B2Jan 26, 2016
Circuit board for peripheral circuits of high-capacity modules, and a high-capacity module including a peripheral circuit using the circuit board
NGK INSULATORS LTD2 citations63
US9064758B2Jun 23, 2015
High-capacity module including the peripheral circuit using the circuit board and the circuit board concerned for peripheral circuits of a high-capacity module
NGK INSULATORS LTD2 citations63
US8958215B2Feb 17, 2015
Circuit board for peripheral circuits of high-capacity modules, and a high-capacity module including a peripheral circuit using the circuit board
NGK INSULATORS LTD3 citations63
US7511409B2Mar 31, 2009
Dielectric film element and composition
NGK INSULATORS LTD2 citations63
US7441317B2Oct 28, 2008
Piezoelectric/electrostrictive device and method for manufacturing the same
NGK INSULATORS LTD3 citations63
US7276462B2Oct 2, 2007
Dielectric composition and dielectric film element
NGK INSULATORS LTD4 citations63
US6887397B2May 3, 2005
Piezoelectric/electrostrictive material and process for production thereof
NGK INSULATORS LTD5 citations63
US6617274B2Sep 9, 2003
Electric-field-inducible deformable material
NGK INSULATORS LTD2 citations63
US6448623B2Sep 10, 2002
Piezoelectric/electrostrictive film type device
NGK INSULATORS LTD6 citations63
US6399529B1Jun 4, 2002
Electric-field-inducible deformable material
NGK INSULATORS LTD3 citations63
US9212085B2Dec 15, 2015
Glass-ceramics composite material
NGK INSULATORS LTD3 citations62
US7956518B2Jun 7, 2011
Piezoelectric/electrostrictive ceramic composition and piezoelectric/electrostrictive device
NGK INSULATORS LTD5 citations62
US7803282B2Sep 28, 2010
Piezoelectric/electrostrictive body, manufacturing method of the same, and piezoelectric/electrostrictive element
NGK INSULATORS LTD4 citations62
US7598659B2Oct 6, 2009
Piezoelectric ceramic and method of manufacturing the same
NGK INSULATORS LTD6 citations62
US7567021B2Jul 28, 2009
Monomorph type piezoelectric/electrostrictive device and method for manufacturing the same
NGK INSULATORS LTD4 citations62
US7482739B2Jan 27, 2009
Electron emitter comprised of dielectric material mixed with metal
NGK INSULATORS LTD2 citations62
US5668071ASep 16, 1997
Piezoelectric porcelain
NGK INSULATORS LTD5 citations62
US7425790B2Sep 16, 2008
Piezoelectric/electrostrictive porcelain composition, piezoelectric/electrostrictive device, and method of piezoelectric/electrostrictive device
NGK INSULATORS LTD4 citations61
US11548829B2Jan 10, 2023
Dense composite material, method for producing the same, joined body, and member for semiconductor manufacturing device
NGK INSULATORS LTD0 citations60
US11926570B2Mar 12, 2024
Composite sintered body, semiconductor manufacturing apparatus member, and method of producing composite sintered body
NGK INSULATORS LTD0 citations57
KOKUSAN DENKI CO
2 patentsKYOCERA DOCUMENT SOLUTIONS INC
2 patentsTOKYO ELECTRON LTD
1 patentDAINIPPON INK & CHEMICALS
1 patentMURAMATSU SHUICHI
1 patentKAIGAWA KAZUYUKI
1 patentSAKAUE HIROMITSU
1 patentTANAKA RITSU
1 patentShowing the top 50 of 83 patents by PatentIndex Score.