Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4357431 | Ball-point pen ink composition erasable by rubber eraser | Nobuyuki Murakami | 1982-11-02 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4357431 | Ball-point pen ink composition erasable by rubber eraser | Nobuyuki Murakami | 1982-11-02 |