Inventor
Ryoji Nakayama
Inventor
Omiya, JP
Overview
Patents· 25 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H01Fprimary
H01FMagnets27%
B22FWorking metallic powder19%
Y10TTechnical subjects covered by former us classification12%
C22CAlloys10%
C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds4%
C08JWorking-up4%
C08LCompositions of macromolecular compounds4%
B29CShaping or joining of plastics3%
C01BNon-metallic elements3%
C22FChanging the physical structure of non-ferrous metals and non-ferrous alloys3%
PatentTitleYear
10,941,265Polypropylene-type resin pre-expanded particles, and method for producing said pre-expanded particles20219,269,481'Iron powder coated with Mg-containing oxide film'20168,552,116'Polypropylene resin, polypropylene resin composition, and foam-injection-molded article'20138,481,178'Iron powder coated with Mg-containing oxide film'20138,481,179'Rare earth magnet having high strength and high electrical resistance'20138,409,371'Method for producing soft magnetic metal powder coated with Mg-containing oxide film'20137,919,200'Rare earth magnet having high strength and high electrical resistance'20117,632,360'Rare earth magnet powder and method of producing the same'20097,622,012'Flat soft magnetic metal powder and composite magnetic material including the soft magnetic metal powder'20097,575,645'Fe-Ni-Mo soft magnetic flaky powder and magnetic composite material containing soft magnetic powder'20097,497,914'Fe-Ni-Mo soft magnetic flaky powder and magnetic composite material containing soft magnetic powder'20097,423,071'Polypropylene based resin composition, expanded moldings comprising the same and method for production thereof'20087,371,271'Composite soft magnetic sintered material having high density and high magnetic permeability and method for preparation thereof'20085,993,732'Method for manufacturing a rare earth magnetic powder having high magnetic anisotropy'19995,587,024'Solid resin-coated magnet powder and a method for producing an anisotropic bonded magnet therefrom'19965,505,794'Method for heat treating metallic materials and apparatus therefor'19965,486,239'Method of manufacturing magnetically anisotropic R-T-B-M powder material and method of manufacturing anisotropic magnets using said powder material'19965,417,773'Method for producing rare earth alloy magnet powder'19955,395,462'Anisotropic rare earth-Fe-B system and rare earth-Fe-Co-B system magnet'19955,354,040'Apparatus for closed cycle hydrogenation recovery and rehydrogenation'19945,338,371'Rare earth permanent magnet powder, method for producing same and bonded magnet'19945,250,206'Rare 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 therefrom'19935,228,930'Rare earth permanent magnet power, method for producing same and bonded magnet'19935,110,374'Rare earth-iron-boron magnet powder and process of producing same'19924,981,532'Rare earth-iron-boron magnet powder and process of producing same'1991Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1991–1996Based in Omiya, JP· patent location history
1992–2009Patents assigned to MITSUBISHI MATERIALS CORP (12)· patent assignee history
1996–2008Based in Saitama, JP· patent location history
2008–2021Patents assigned to KANEKA CORP (3)· patent assignee history
2008–2013Based in Settsu, JP· patent location history
2009–2016Based in Kashiwa, JP· patent location history
2009–2013Based in Naka-gun, JP· patent location history
2013–2016Patents assigned to NAKAYAMA RYOJI (5)· patent assignee history
2013–2016Patents assigned to WATANABE MUNEAKI (4)· patent assignee history
2013–2016Patents assigned to DIAMET CORP (3)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| MITSUBISHI MATERIALS CORP | 12 | 1992–2009 |
| NAKAYAMA RYOJIself | 5 | 2013–2016 |
| WATANABE MUNEAKI | 4 | 2013–2016 |
| DIAMET CORP | 3 | 2013–2016 |
| KANEKA CORP | 3 | 2008–2021 |
Locations
| Location | Patents | Span |
|---|---|---|
| Omiya, JP | 8 | 1991–1996 |
| Kashiwa, JP | 3 | 2009–2016 |
| Naka-gun, JP | 3 | 2009–2013 |
| Saitama, JP | 3 | 1996–2008 |
| Settsu, JP | 2 | 2008–2013 |