Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4435099 | Fountain pen with motor feed | — | 1984-03-06 |
| 4350458 | Fountain pen with battery operated supply detector and ink pressurizing device | Teibun Yasunaga | 1982-09-21 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4435099 | Fountain pen with motor feed | — | 1984-03-06 |
| 4350458 | Fountain pen with battery operated supply detector and ink pressurizing device | Teibun Yasunaga | 1982-09-21 |