Assignee
SUMITOMO SPEC METALS
JP·256 granted patents·5 pending applications·5,802 citations·filing 1980–2004
Top patents by PatentIndex Score
261 records- 0199US4792368AMagnetic materials and permanent magnetsSUMITOMO SPEC METALS·Filed 1983·Granted Dec 20, 1988·143 cites·40 claims
- 0299US4770723AMagnetic materials and permanent magnetsSUMITOMO SPEC METALS·Filed 1987·Granted Sep 13, 1988·196 cites·35 claims
- 0399US4597938AProcess for producing permanent magnet materialsSUMITOMO SPEC METALS·Filed 1983·Granted Jul 1, 1986·111 cites·32 claims
- 0498US4601875AProcess for producing magnetic materialsSUMITOMO SPEC METALS·Filed 1983·Granted Jul 22, 1986·98 cites·38 claims
- 0596US6452472B1Pole-piece unit, method for assembling the same, and magnetic field generatorSUMITOMO SPEC METALS·Filed 2000·Granted Sep 17, 2002·79 cites·6 claims
- 0696US4837114AProcess for producing magnets having improved corrosion resistanceSUMITOMO SPEC METALS·Filed 1986·Granted Jun 6, 1989·82 cites·45 claims
- 0795US4679022AMagnetic field generating device for NMR-CTSUMITOMO SPEC METALS·Filed 1986·Granted Jul 7, 1987·85 cites·13 claims
- 0894US6443143B1Method and apparatus for cutting rare earth alloySUMITOMO SPEC METALS·Filed 2000·Granted Sep 3, 2002·82 cites·23 claims
- 0994US6277506B1Thin film magnetic head thin film magnetic head substrate and method for fabricating such substrateSUMITOMO SPEC METALS·Filed 2000·Granted Aug 21, 2001·49 cites·16 claims
- 1094US5283544AMagnetic field generating device used for MRISUMITOMO SPEC METALS·Filed 1991·Granted Feb 1, 1994·77 cites·17 claims
- 1194US4773950APermanent magnetSUMITOMO SPEC METALS·Filed 1983·Granted Sep 27, 1988·46 cites·26 claims
- 1294US4684406APermanent magnet materialsSUMITOMO SPEC METALS·Filed 1986·Granted Aug 4, 1987·59 cites·1 claims
- 1393US5645651AMagnetic materials and permanent magnetsSUMITOMO SPEC METALS·Filed 1995·Granted Jul 8, 1997·50 cites·24 claims
- 1493US5032304AMethod of manufacturing transparent high density ceramic materialSUMITOMO SPEC METALS·Filed 1990·Granted Jul 16, 1991·98 cites·9 claims
- 1593US4855854AThin-film magnetic headSUMITOMO SPEC METALS·Filed 1988·Granted Aug 8, 1989·53 cites·20 claims
- 1692US6449123B1Methods for marking a sintered product and for fabricating magnetic head substrateSUMITOMO SPEC METALS·Filed 2000·Granted Sep 10, 2002·38 cites·19 claims
- 1792US6403024B1Hydrogen pulverizer for rare-earth alloy magnetic material powder using the pulverizer, and method for producing magnet using the pulverizerSUMITOMO SPEC METALS·Filed 2000·Granted Jun 11, 2002·39 cites·23 claims
- 1890US7002071B1Thermoelectric conversion material and method of producing the sameSUMITOMO SPEC METALS·Filed 2000·Granted Feb 21, 2006·59 cites·22 claims
- 1990US6491765B2Rare earth magnet and method for manufacturing the sameSUMITOMO SPEC METALS·Filed 2001·Granted Dec 10, 2002·31 cites·17 claims
- 2090US6432158B1Method and apparatus for producing compact of rare earth alloy powder and rare earth magnetSUMITOMO SPEC METALS·Filed 2000·Granted Aug 13, 2002·42 cites·5 claims
- 2190US5666635AFabrication methods for R-Fe-B permanent magnetsSUMITOMO SPEC METALS·Filed 1995·Granted Sep 9, 1997·58 cites·21 claims
- 2290US4818966AMagnetic field generating deviceSUMITOMO SPEC METALS·Filed 1988·Granted Apr 4, 1989·78 cites·10 claims
- 2390US4777464AMagnetic field generating device for NMR-CTSUMITOMO SPEC METALS·Filed 1987·Granted Oct 11, 1988·104 cites·9 claims
- 2489US6000128AProcess of producing a multi-layered printed-coil substrateSUMITOMO SPEC METALS·Filed 1997·Granted Dec 14, 1999·76 cites·10 claims
- 2589US5952909AMulti-layered printed-coil substrate, printed-coil substrates and printed-coil componentsSUMITOMO SPEC METALS·Filed 1996·Granted Sep 14, 1999·65 cites·10 claims
- 2688US6527874B2Rare earth magnet and method for making sameSUMITOMO SPEC METALS·Filed 2001·Granted Mar 4, 2003·29 cites·8 claims
- 2788US5316595AProcess for producing magnets having improved corrosion resistanceSUMITOMO SPEC METALS·Filed 1991·Granted May 31, 1994·44 cites·8 claims
- 2888US5252924AMagnetic field generating apparatus for MRISUMITOMO SPEC METALS·Filed 1991·Granted Oct 12, 1993·58 cites·11 claims
- 2988US5225953AMagnetic thin film head of a single magnetic pole for perpendicular recording and reproductionSUMITOMO SPEC METALS·Filed 1992·Granted Jul 6, 1993·48 cites·16 claims
- 3088US4796127ARecording head sliderSUMITOMO SPEC METALS·Filed 1988·Granted Jan 3, 1989·36 cites·22 claims
- 3188US4767474AIsotropic magnets and process for producing sameSUMITOMO SPEC METALS·Filed 1983·Granted Aug 30, 1988·33 cites·23 claims
- 3287US4828905AMagnetic recording mediumSUMITOMO SPEC METALS·Filed 1987·Granted May 9, 1989·35 cites·25 claims
- 3387US4826546AProcess for producing permanent magnets and products thereofSUMITOMO SPEC METALS·Filed 1987·Granted May 2, 1989·33 cites·50 claims
- 3486US6537385B2Rare earth magnet and method for manufacturing the sameSUMITOMO SPEC METALS·Filed 2002·Granted Mar 25, 2003·22 cites·11 claims
- 3586US6386948B1Magnet member cutting method and magnet member cuttingSUMITOMO SPEC METALS·Filed 2000·Granted May 14, 2002·29 cites·20 claims
- 3686US6340888B1Magnetic field generator for MRISUMITOMO SPEC METALS·Filed 1999·Granted Jan 22, 2002·58 cites·7 claims
- 3786US6302972B1Nanocomposite magnet material and method for producing nanocomposite magnetSUMITOMO SPEC METALS·Filed 1999·Granted Oct 16, 2001·49 cites·16 claims
- 3886US5229723AMagnetic field generating device for mriSUMITOMO SPEC METALS·Filed 1990·Granted Jul 20, 1993·65 cites·11 claims
- 3986US4608293AComposite substrate for a thin-film magnetic headSUMITOMO SPEC METALS·Filed 1983·Granted Aug 26, 1986·29 cites·5 claims
- 4086US4430440AMagnetic head slider materialSUMITOMO SPEC METALS·Filed 1982·Granted Feb 7, 1984·52 cites·5 claims
- 4185US6399150B1Rare earth metal-based permanent magnet, and process for producing the sameSUMITOMO SPEC METALS·Filed 2000·Granted Jun 4, 2002·23 cites·4 claims
- 4285US6329087B1Wafer for magnetic head and magnetic headSUMITOMO SPEC METALS·Filed 1999·Granted Dec 11, 2001·42 cites·8 claims
- 4385US5621324AMagnetic field generator for MRISUMITOMO SPEC METALS·Filed 1993·Granted Apr 15, 1997·51 cites·25 claims
- 4485US4840684AIsotropic permanent magnets and process for producing sameSUMITOMO SPEC METALS·Filed 1983·Granted Jun 20, 1989·27 cites·13 claims
- 4585US4770702AProcess for producing the rare earth alloy powdersSUMITOMO SPEC METALS·Filed 1988·Granted Sep 13, 1988·40 cites·14 claims
- 4684US6676773B2Rare earth magnet and method for producing the magnetSUMITOMO SPEC METALS·Filed 2001·Granted Jan 13, 2004·16 cites·2 claims
- 4784US6478889B2Iron-base alloy permanent magnet powder and method for producing the sameSUMITOMO SPEC METALS·Filed 2000·Granted Nov 12, 2002·23 cites·5 claims
- 4884US6474576B1Milling apparatus and milling methodSUMITOMO SPEC METALS·Filed 2000·Granted Nov 5, 2002·19 cites·7 claims
- 4984US6461565B2Method of pressing rare earth alloy magnetic powderSUMITOMO SPEC METALS·Filed 2001·Granted Oct 8, 2002·22 cites·12 claims
- 5083US6706124B2Permanent magnet including multiple ferromagnetic phases and method of producing the magnetSUMITOMO SPEC METALS·Filed 2001·Granted Mar 16, 2004·24 cites·29 claims
Showing the top 50 of 261 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when SUMITOMO SPEC METALS files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →