Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12054622 | Oil-based ink composition for writing utensils, writing utensil using same, and airbrush unit using same | Takayuki Ikai | 2024-08-06 |
| 11795336 | Oil-based ink composition for writing implements | — | 2023-10-24 |
| 11649363 | Oil-based ink composition for writing instrument | — | 2023-05-16 |