Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8439587 | Joining member and ballpoint pen employing the same | — | 2013-05-14 |
| 8246734 | Writing ink composition | Akinori Tanaka | 2012-08-21 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8439587 | Joining member and ballpoint pen employing the same | — | 2013-05-14 |
| 8246734 | Writing ink composition | Akinori Tanaka | 2012-08-21 |