Inventor
MATSUHIRO KEIJI
JP22 patents
⚠️ This page may combine multiple inventors who share the name “MATSUHIRO KEIJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NGK INSULATORS LTD
17 patentsUS7446696B2Nov 4, 2008
Radio oscillating and radar systems
NGK INSULATORS LTD26 citations93
US5273839ADec 28, 1993
Fuel cell generator
NGK INSULATORS LTD34 citations92
US5175063ADec 29, 1992
Fuel cell generator
NGK INSULATORS LTD23 citations92
US5182059AJan 26, 1993
Process for producing high density SiC sintered bodies
NGK INSULATORS LTD27 citations91
US4560669ADec 24, 1985
Silicon nitride sintered bodies of Si3 N4, Y2 O3, MgO and ZrO2
NGK INSULATORS LTD23 citations82
US4535063AAug 13, 1985
Silicon nitride sintered bodies and a method for producing the same
NGK INSULATORS LTD19 citations82
US5254510AOct 19, 1993
Heat resistive phosphate sintered bodies and a process for producing the same
NGK INSULATORS LTD16 citations74
US5238882AAug 24, 1993
Method of manufacturing silicon nitride sintered bodies
NGK INSULATORS LTD9 citations74
US5232907AAug 3, 1993
Yttrium-barrium-copper oxide powder and process for manufacturing yttrium-barrium-copper oxide superconducting sintered body
NGK INSULATORS LTD7 citations74
US5229224AJul 20, 1993
Fuel cell generator
NGK INSULATORS LTD10 citations74
US5217934AJun 8, 1993
Heat resistive phosphate-zircon composite bodies and process for producing same
NGK INSULATORS LTD10 citations74
US5177038AJan 5, 1993
Silicon nitride sintered bodies
NGK INSULATORS LTD10 citations74
US5128288AJul 7, 1992
Phosphate compounds, sintered bodies thereof and manufacture of the sintered bodies
NGK INSULATORS LTD8 citations74
US5116809AMay 26, 1992
Oxide series superconductive sintered body and method of producing the same
NGK INSULATORS LTD10 citations74
US5049456ASep 17, 1991
Electroconductive interconnecting member and fuel cell having the member
NGK INSULATORS LTD9 citations74
US4640903AFeb 3, 1987
Silicon nitride sintered bodies and a method for producing the same
NGK INSULATORS LTD15 citations74
US4558018ADec 10, 1985
Silicon nitride sintered bodies and a method for producing the same
NGK INSULATORS LTD14 citations74