Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6770689 | Aqueous glittering ink | Yasuyuki Yoshimura, Yuki Yamamoto, Tomohiro Sawa | 2004-08-03 |
| 6730154 | Polychromic ink composition depending on viewing angle | Hiroshi Inoue, Satoshi Maruyama, Norihiro Hirano, Hidetoshi Fukuo, Shoko Matsumoto +1 more | 2004-05-04 |
| 6730717 | Aqueous glittering ink composition | Yasuyuki Yoshimura, Yuki Yamamoto, Tomohiro Sawa | 2004-05-04 |
| 6706103 | Water-based metallic ink composition and writing instrument using same | Yasuyuki Yoshimura | 2004-03-16 |