Inventor
KOJIMA KIYOSHI
23 patents
⚠️ This page may combine multiple inventors who share the name “KOJIMA KIYOSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD
13 patentsUS5364253ANov 15, 1994
Magnetic circuit component molding device
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD61 citations94
US5751828AMay 12, 1998
Magnetic circuit unit for loud-speaker and method of manufacturing the same
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD31 citations89
US5609695AMar 11, 1997
Method for producing alloy powder of the R2 T17 system, a method for producing magnetic powder of the R2 T17 Nx system, and a high pressure heat-treatment apparatus
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD16 citations82
US5886077AMar 23, 1999
Rare-earth-iron-nitrogen based magnetic material and method of manufacturing the same
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD9 citations74
US5684076ANov 4, 1997
Rare earth-iron-nitrogen based magnetic material and method of manufacturing the same
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD12 citations74
US4133703AJan 9, 1979
Permanent magnetic Mn-Al-C alloy
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD11 citations74
US5213703AMay 25, 1993
Anisotropic neodymium-iron-boron system plastic bonded magnet
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD9 citations72
US4042429AAug 16, 1977
Magnetic alloys having wasp-waisted magnetic hysteresis loop
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD11 citations72
US4023991AMay 17, 1977
Anisotropic permanent magnet of Mn-Al-C alloy
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD12 citations72
US3976519AAug 24, 1976
Machinable anisotropic permanent magnets of Mn-Al-C alloys
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD10 citations72
US3944445AMar 16, 1976
Method of making permanent magnets of Mn-Al-C alloy
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD8 citations71
US5776263AJul 7, 1998
Method for producing alloy powder of the R2T17 system, a method for producing magnetic powder of the of the R2T17NX system, and a high pressure heat-treatment apparatus
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD2 citations63
US4443276AApr 17, 1984
Mn--Al--C Alloys for anisotropic permanent magnets
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD3 citations61
KWANSEI GAKUIN EDUCATIONAL FOUND
4 patentsUS12247319B2Mar 11, 2025
Method for producing a SiC seed crystal for growth of a SiC ingot by heat-treating in a main container made of a SiC material
KWANSEI GAKUIN EDUCATIONAL FOUND2 citations74
US12098476B2Sep 24, 2024
Method for producing a SiC substrate via an etching step, growth step, and peeling step
KWANSEI GAKUIN EDUCATIONAL FOUND5 citations74
US12571626B2Mar 10, 2026
Method for measuring etching amount, and measurement system therefor
KWANSEI GAKUIN EDUCATIONAL FOUND0 citations62
US12581873B2Mar 17, 2026
Method of manufacturing SiC semiconductor device and SiC semiconductor device
KWANSEI GAKUIN EDUCATIONAL FOUND0 citations52
NIPPON STEEL & SUMIKIN MAT CO
3 patentsUS10202706B2Feb 12, 2019
Silicon carbide single crystal wafer and method of manufacturing a silicon carbide single crystal ingot
NIPPON STEEL & SUMIKIN MAT CO2 citations68
US10031089B2Jul 24, 2018
Method for evaluating internal stress of silicon carbide monocrystalline wafer and method for predicting warpage in silicone carbide monocrystalline wafer
NIPPON STEEL & SUMIKIN MAT CO3 citations68
US10048142B2Aug 14, 2018
Evaluation method for bulk silicon carbide single crystals and reference silicon carbide single crystal used in said method
NIPPON STEEL & SUMIKIN MAT CO0 citations51