Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4824271 | Nib for writing instruments | Masamitsu Nagahama, Masaaki Ohsawa | 1989-04-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4824271 | Nib for writing instruments | Masamitsu Nagahama, Masaaki Ohsawa | 1989-04-25 |