Sumitomo Special Metals Co., Ltd.
275Patents
0Active
275Granted
42Portfolio score
Filing activity: Jan 9, 1981 → Jan 9, 2004
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4770723A | Magnetic materials and permanent magnets | Electricity | 114 | Expired |
| US5032304A | Method of manufacturing transparent high density ceramic material | Chemistry; Metallurgy | 89 | Expired |
| US4597938A | Process for producing permanent magnet materials | Emerging Cross-Sectional Technologies | 86 | Expired |
| US4792368A | Magnetic materials and permanent magnets | Electricity | 86 | Expired |
| US4777464A | Magnetic field generating device for NMR-CT | Physics | 84 | Expired |
| US4601875A | Process for producing magnetic materials | Emerging Cross-Sectional Technologies | 82 | Expired |
| US4679022A | Magnetic field generating device for NMR-CT | Electricity | 66 | Expired |
| US6443143B1 | Method and apparatus for cutting rare earth alloy | Emerging Cross-Sectional Technologies | 61 | Expired |
| US5064029A | Eddy current retarder | Electricity | 59 | Expired |
| US4818966A | Magnetic field generating device | Physics | 56 | Expired |
| US5283544A | Magnetic field generating device used for MRI | Physics | 55 | Expired |
| US6452472B1 | Pole-piece unit, method for assembling the same, and magnetic field generator | Electricity | 55 | Expired |
| US4684406A | Permanent magnet materials | Emerging Cross-Sectional Technologies | 48 | Expired |
| US6000128A | Process of producing a multi-layered printed-coil substrate | Emerging Cross-Sectional Technologies | 47 | Expired |
| US5952909A | Multi-layered printed-coil substrate, printed-coil substrates and printed-coil components | Emerging Cross-Sectional Technologies | 47 | Expired |
| US4837114A | Process for producing magnets having improved corrosion resistance | Electricity | 44 | Expired |
| US5252924A | Magnetic field generating apparatus for MRI | Physics | 42 | Expired |
| US4855854A | Thin-film magnetic head | Emerging Cross-Sectional Technologies | 41 | Expired |
| US6277506A | Thin film magnetic head thin film magnetic head substrate and method for fabricating such substrate | Physics | 41 | Expired |
| US4430440A | Magnetic head slider material | Emerging Cross-Sectional Technologies | 40 | Expired |
| US5225953A | Magnetic thin film head of a single magnetic pole for perpendicular recording and reproduction | Emerging Cross-Sectional Technologies | 38 | Expired |
| US4770702A | Process for producing the rare earth alloy powders | Electricity | 34 | Expired |
| US5621324A | Magnetic field generator for MRI | Physics | 33 | Expired |
| US5666635A | Fabrication methods for R-Fe-B permanent magnets | Performing Operations; Transporting | 31 | Expired |
| US4659606A | Substrate members for recording disks and process for producing same | Emerging Cross-Sectional Technologies | 31 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.