Inventor
Keiji Nakajima
Inventor
Tokyo, JP
Overview
Patents· 7 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B22Dprimary
B22DCasting of metals8%
C09DCoating compositions, e.g. paints, varnishes or lacquers8%
C22CAlloys8%
C22FChanging the physical structure of non-ferrous metals and non-ferrous alloys8%
G03GElectrography8%
A63BApparatus for physical training, gymnastics, swimming, climbing, or fencing4%
B29CShaping or joining of plastics4%
B29DProducing particular articles from plastics or from substances in a plastic state4%
B29KIndexing scheme associated with subclasses b29b, b29c or b29d, relating to moulding materials or to materials for moulds, reinforcements, fillers or preformed parts, e.g. inserts4%
B29LIndexing scheme associated with subclass b29c, relating to particular articles4%
PatentTitleYear
10,106,870Copper alloy and process for producing the same201810,023,940Copper alloy and process for producing the same20186,368,399'Composite pigments, coloring compositions, and image recording substances'20026,258,503'Production process of colored fine particulate composition and colored fine particulate composition produced by the process'20015,814,434'Composition for black matrix, fabrication process of black matrix and article provided with black matrix'19985,036,544'Apparatus for discriminating linearity of line segment in image processing system'19914,643,424'Ball for ballgames and manufacturing process thereof'1987Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1987–2018Patents assigned to NAKAJIMA KEIJI (2)· patent assignee history
1987–2018Based in Tokyo, JP· patent location history
1991Based in Hyogo, JP· patent location history
1998–2002Patents assigned to DAINICHISEIKA COLOR CHEM (3)· patent assignee history
2018Patents assigned to NIPPON STEEL & SUMITOMO METAL CORP (2)· patent assignee history
2018Patents assigned to MAEDA TAKASHI (1)· patent assignee history
2018Patents assigned to MAEHARA YASUHIRO (1)· patent assignee history
2018Based in Osaka, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| DAINICHISEIKA COLOR CHEM | 3 | 1998–2002 |
| NAKAJIMA KEIJIself | 2 | 1987–2018 |
| NIPPON STEEL & SUMITOMO METAL CORP | 2 | 2018 |
| MAEDA TAKASHI | 1 | 2018 |
| MAEHARA YASUHIRO | 1 | 2018 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokyo, JP | 5 | 1987–2018 |
| Osaka, JP | 1 | 2018 |
| Hyogo, JP | 1 | 1991 |