Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10569595 | Direct liquid type of writing tool | — | 2020-02-25 |
| 8128304 | Direct-fluid-supply writing implement | Takao Inaba | 2012-03-06 |
| 7578631 | Direct-fluid-supply writing implement | Takao Inaba | 2009-08-25 |
| D484537 | Ball-point pen | Naomi Arita | 2003-12-30 |