Inventor
Takayuki Ikai
Inventor
Yokohama, 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 lacquers56%
B43KImplements for writing or drawing33%
C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments11%
PatentTitleYear
10,569,596Writing tool refill and writing tool using same20207,381,754'Oil-based ink composition and uses thereof'20087,311,459'Follower for non-aqueous ball point pen and non-aqueous ball point pen'20076,945,726'Refill for oil-based ink ballpoint pen and oil-based ink ballpoint pen'20056,830,611'Oil-base ink composition, writing utensils and dyes to be used therein'20046,441,061'Additive for oil-based ink for a ball point pen and oil based ink for a ball point pen containing the same'20025,942,027'Ink for ball point pen'1999Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1999–2020Patents assigned to MITSUBISHI PENCIL CO (7)· patent assignee history
1999–2020Based in Yokohama, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| MITSUBISHI PENCIL CO | 7 | 1999–2020 |
Locations
| Location | Patents | Span |
|---|---|---|
| Yokohama, JP | 7 | 1999–2020 |