Inventor · disambiguated record
Ryoji Nakayama
Also filed as: NAKAYAMA RYOJI
25 granted patents·2 pending applications·333 citations·filing 1988–2019
96Inventor score
Files withMITSUBISHI MATERIALS CORP12KANEKA CORP4WATANABE MUNEAKI3MITSUBISHI MATERIALS PMG CORP2MITSUBISHI METAL CORP2
Top patents by PatentIndex Score
27 records- 0196US4981532ARare earth-iron-boron magnet powder and process of producing sameMITSUBISHI METAL CORP·Filed 1988·Granted Jan 1, 1991·73 cites·8 claims
- 0292US7423071B2Polypropylene based resin composition, expanded moldings comprising the same and method for production thereofKANEKA CORP·Filed 2004·Granted Sep 9, 2008·42 cites·6 claims
- 0381US5228930ARare earth permanent magnet power, method for producing same and bonded magnetMITSUBISHI MATERIALS CORP·Filed 1990·Granted Jul 20, 1993·30 cites·14 claims
- 0479US8409371B2Method for producing soft magnetic metal powder coated with Mg-containing oxide filmWATANABE MUNEAKI·Filed 2011·Granted Apr 2, 2013·3 cites·6 claims
- 0577US8552116B2Polypropylene resin, polypropylene resin composition, and foam-injection-molded articleOKURA TETSUO·Filed 2010·Granted Oct 8, 2013·5 cites·15 claims
- 0677US8481178B2Iron powder coated with Mg-containing oxide filmWATANABE MUNEAKI·Filed 2011·Granted Jul 9, 2013·2 cites·6 claims
- 0775US7919200B2Rare earth magnet having high strength and high electrical resistanceNISSAN MOTOR·Filed 2006·Granted Apr 5, 2011·6 cites·8 claims
- 0872US8481179B2Rare earth magnet having high strength and high electrical resistanceMORI KATSUHIKO·Filed 2011·Granted Jul 9, 2013·2 cites·16 claims
- 0972US5110374ARare earth-iron-boron magnet powder and process of producing sameMITSUBISHI MATERIALS CORP·Filed 1990·Granted May 5, 1992·27 cites·12 claims
- 1070US11015033B2Expandable styrene resin particles, pre-expanded particles of styrene resin, styrene resin foam molded body, and method for producing expandable resin particlesKANEKA CORP·Filed 2016·Granted May 25, 2021·1 cites·17 claims
- 1169US7622012B2Flat soft magnetic metal powder and composite magnetic material including the soft magnetic metal powderMITSUBISHI MATERIALS CORP·Filed 2006·Granted Nov 24, 2009·3 cites·25 claims
- 1267US7632360B2Rare earth magnet powder and method of producing the sameNISSAN MOTOR·Filed 2004·Granted Dec 15, 2009·10 cites·7 claims
- 1366US5505794AMethod for heat treating metallic materials and apparatus thereforMITSUBISHI MATERIALS CORP·Filed 1994·Granted Apr 9, 1996·15 cites·6 claims
- 1464US10941265B2Polypropylene-type resin pre-expanded particles, and method for producing said pre-expanded particlesKANEKA CORP·Filed 2019·Granted Mar 9, 2021·0 cites·11 claims
- 1563US5486239AMethod of manufacturing magnetically anisotropic R-T-B-M powder material and method of manufacturing anisotropic magnets using said powder materialMITSUBISHI MATERIALS CORP·Filed 1993·Granted Jan 23, 1996·21 cites·19 claims
- 1661US5338371ARare earth permanent magnet powder, method for producing same and bonded magnetMITSUBISHI METAL CORP·Filed 1992·Granted Aug 16, 1994·17 cites·10 claims
- 1759US5250206ARare earth element-Fe-B or rare earth element-Fe-Co-B permanent magnet powder excellent in magnetic anisotropy and corrosion resistivity and bonded magnet manufactured therefromMITSUBISHI MATERIALS CORP·Filed 1991·Granted Oct 5, 1993·18 cites·17 claims
- 1856US5417773AMethod for producing rare earth alloy magnet powderMITSUBISHI MATERIALS CORP·Filed 1994·Granted May 23, 1995·14 cites·2 claims
- 1954US7371271B2Composite soft magnetic sintered material having high density and high magnetic permeability and method for preparation thereofMITSUBISHI MATERIALS PMG CORP·Filed 2002·Granted May 13, 2008·6 cites·15 claims
- 2052US7575645B2Fe-Ni-Mo soft magnetic flaky powder and magnetic composite material containing soft magnetic powderMITSUBISHI MATERIALS CORP·Filed 2004·Granted Aug 18, 2009·3 cites·6 claims
- 2151US9269481B2Iron powder coated with Mg-containing oxide filmWATANABE MUNEAKI·Filed 2005·Granted Feb 23, 2016·0 cites·11 claims
- 2250US5395462AAnisotropic rare earth-Fe-B system and rare earth-Fe-Co-B system magnetMITSUBISHI MATERIALS CORP·Filed 1993·Granted Mar 7, 1995·11 cites·10 claims
- 2350US2008003126A1Method for Producing Soft Magnetic Metal Powder Coated With Mg-Containing Oxide Film and Method for Producing Composite Soft Magnetic Material Using Said PowderMITSUBISHI MATERIALS PMG CORP·Filed 2005·Application pending·0 cites
- 2449US5993732AMethod for manufacturing a rare earth magnetic powder having high magnetic anisotropyMITSUBISHI MATERIALS CORP·Filed 1998·Granted Nov 30, 1999·14 cites·16 claims
- 2549US5354040AApparatus for closed cycle hydrogenation recovery and rehydrogenationMITSUBISHI MATERIALS CORP·Filed 1992·Granted Oct 11, 1994·6 cites·26 claims
- 2642US2017009110A1Polyolefin resin composition for hot melt adhesive, hot melt adhesive film, and laminateKANEKA CORP·Filed 2015·Application pending·0 cites
- 2736US5587024ASolid resin-coated magnet powder and a method for producing an anisotropic bonded magnet therefromMITSUBISHI MATERIALS CORP·Filed 1995·Granted Dec 24, 1996·4 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →