Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5609432 | Ballpoint pen containing an aqueous ink composition | Takeyuki Yamamoto, Yasuyuki Sugimoto, Itaru Wakagi, Yasuzo Murata | 1997-03-11 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5609432 | Ballpoint pen containing an aqueous ink composition | Takeyuki Yamamoto, Yasuyuki Sugimoto, Itaru Wakagi, Yasuzo Murata | 1997-03-11 |