Inventor
Koji Akioka
Inventor
Nagano, JP
Overview
Patents· 42 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H01Fprimary
H01FMagnets19%
C22CAlloys12%
G03GElectrography12%
C21DModifying the physical structure of ferrous metals10%
B22FWorking metallic powder8%
Y10TTechnical subjects covered by former us classification5%
C23CCoating metallic material4%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests4%
C09DCoating compositions, e.g. paints, varnishes or lacquers4%
B05DProcesses for applying fluent materials to surfaces, in general3%
PatentTitleYear
11,028,276Surface-treated metal sheet, coated member, and method for producing coated member202110,987,695Hot-dip zinc-based plated steel sheet202110,851,465Zinc-based plated steel sheet202010,549,506Hot-dip zinc-based plated steel sheet202010,370,735Heat treated steel product having high strength and excellent chemical conversion coating ability and method of production of same20198,080,355'Liquid developer and image forming apparatus'20118,021,815'Liquid developer and image forming device'20117,943,282'Liquid developer and image forming apparatus'20117,932,009'Liquid developer and image forming apparatus'20117,883,825'Image forming apparatus and method for forming an image on a recording medium'20117,862,976'Liquid developer and image forming apparatus'20117,756,444'Liquid Developer'20107,723,005'Liquid developer'20107,608,376'Method of manufacturing liquid developer, liquid developer, and image forming apparatus'20097,595,140'Liquid developer and image forming apparatus'20097,563,550'Liquid developer and image forming apparatus'20097,556,907'Liquid developer'20097,514,145'Method and apparatus for producing resin particles using granulation-prevention agent, and resin particles produced by the method'20097,247,414'Method for producing resin particles and toner using the resin particles'20076,527,971'Rare-earth bonded magnet, rare-earth bonded magnet composition, and method of manufacturing the rare-earth bonded magnet'20036,500,374'Method of manufacturing bonded magnets of rare earth metal, and bonded magnet of rare earth metal'20026,464,940'pH sensor and pH measurement method employing the same'20026,387,293'Composition for rare earth bonded magnet use, rare earth bonded magnet and method for manufacturing rare earth bonded magnet'20026,143,193'Rare earth bonded magnet, rare earth magnetic composition, and method for manufacturing rare earth bonded magnet'20006,139,765'Magnetic powder, permanent magnet produced therefrom and process for producing them'20006,136,099'Rare earth-iron series permanent magnets and method of preparation'20005,888,417'Rare earth bonded magnet and composition therefor'19995,888,416'Rare-earth bonded magnet composition, rare-earth bonded magnet and process for producing said rare-earth bonded magnet'19995,733,580'Dies for extrusion moulding'19985,647,886'Magnetic powder, permanent magnet produced therefrom and process for producing them'19975,597,425'Rare earth cast alloy permanent magnets and methods of preparation'19975,565,043'Rare earth cast alloy permanent magnets and methods of preparation'19965,560,784'Rare earth cast alloy permanent magnets and methods of preparation'19965,538,565'Rare earth cast alloy permanent magnets and methods of preparation'19965,536,334'Permanent magnet and a manufacturing method thereof'19965,460,662'Permanent magnet and method of production'19955,352,302'Method of producing a rare-earth permanent magnet'19945,213,631'Rare earth-iron system permanent magnet and process for producing the same'19935,186,761'Magnetic alloy and method of production'19935,125,988'Rare earth-iron system permanent magnet and process for producing the same'19925,076,861'Permanent magnet and method of production'19915,062,095'Actuator and method of manufacturing thereof'1991Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1991–2011Patents assigned to SEIKO EPSON CORP (36)· patent assignee history
1991–2010Based in Nagano, JP· patent location history
1991–2000Based in Suwa, JP· patent location history
2002–2011Based in Matsumoto, JP· patent location history
2011Patents assigned to AKIOKA KOJI (1)· patent assignee history
2011Patents assigned to IKUMA KEN (1)· patent assignee history
2011Based in North Adelaide, AU· patent location history
2019–2021Patents assigned to NIPPON STEEL & SUMITOMO METAL CORP (5)· patent assignee history
2019–2021Patents assigned to NIPPON STEEL CORP (5)· patent assignee history
2019–2021Based in Tokyo, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SEIKO EPSON CORP | 36 | 1991–2011 |
| NIPPON STEEL & SUMITOMO METAL CORP | 5 | 2019–2021 |
| NIPPON STEEL CORP | 5 | 2019–2021 |
| AKIOKA KOJIself | 1 | 2011 |
| IKUMA KEN | 1 | 2011 |
Locations
| Location | Patents | Span |
|---|---|---|
| Nagano, JP | 12 | 1991–2010 |
| Matsumoto, JP | 11 | 2002–2011 |
| Suwa, JP | 10 | 1991–2000 |
| Tokyo, JP | 5 | 2019–2021 |
| North Adelaide, AU | 2 | 2011 |