Inventor
Shinji Tsujio
Inventor
Sakai, JP
Overview
Patents· 7 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C09Dprimary
C09DCoating compositions, e.g. paints, varnishes or lacquers60%
B43LArticles for writing or drawing upon10%
C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients10%
C08LCompositions of macromolecular compounds10%
Y10TTechnical subjects covered by former us classification10%
PatentTitleYear
9,079,450'Plastic eraser, plastic eraser composite body, and method for producing thereof'20156,706,782'Erasable ink and water-base ballpoint pen using same'20046,458,192'Erasable ink composition'20026,306,930'Erasable ink and water-base ballpoint pen using same'20016,203,910'Crayon'20016,074,465'Fluorescent crayon'20004,209,332'Method for manufacturing pencil leads'1980Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1980–2015Patents assigned to SAKURA COLOR PROD CORP (7)· patent assignee history
1980–2004Based in Sakai, JP· patent location history
2015Patents assigned to TSUJIO SHINJI (1)· patent assignee history
2015Based in Osaka, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SAKURA COLOR PROD CORP | 7 | 1980–2015 |
| TSUJIO SHINJIself | 1 | 2015 |
Locations
| Location | Patents | Span |
|---|---|---|
| Sakai, JP | 6 | 1980–2004 |
| Osaka, JP | 1 | 2015 |