Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4966480 | Washing liquid cartridge for refill ink type writing instrument | Ikuo Takagishi, Toshinobu Kosaka, Katsuhiko Kawabata | 1990-10-30 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4966480 | Washing liquid cartridge for refill ink type writing instrument | Ikuo Takagishi, Toshinobu Kosaka, Katsuhiko Kawabata | 1990-10-30 |