Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7468400 | Aqueous glittering ink composition | Naoshi Murata, Yuki Yamamoto, Tomohiro Sawa | 2008-12-23 |
| 7371785 | Erasable ink composition | Norimasa Kurihara, Atsushi Sudo, Norihiro Hirano, Isao Enjon | 2008-05-13 |
| 7173077 | Aqueous glittering ink composition | Naoshi Murata, Yuki Yamamoto, Tomohiro Sawa | 2007-02-06 |
| 6770689 | Aqueous glittering ink | Naoshi Murata, Yuki Yamamoto, Tomohiro Sawa | 2004-08-03 |
| 6730717 | Aqueous glittering ink composition | Naoshi Murata, Yuki Yamamoto, Tomohiro Sawa | 2004-05-04 |
| 6706103 | Water-based metallic ink composition and writing instrument using same | Naoshi Murata | 2004-03-16 |
| 6706101 | Double-color ink and writing utensil containing the same | Yasunori Nakatani | 2004-03-16 |
| 6666913 | Aqueous ink composition | Norihiro Hirano, Norimasa Kurihara, Atsushi Sudo | 2003-12-23 |
| 6497759 | Scratch ink composition and writing utensil containing the same | Naoshi Murata, Yuki Yamamoto | 2002-12-24 |
| 6171381 | Aqueous metallic ink composition | Naoshi Murata, Kenichi Shibuya, Kaoru Matsumoto | 2001-01-09 |
| 5560796 | Transfer sheet | — | 1996-10-01 |
| 5527385 | Thermochromic composition | Masaaki Sumii, Fumiko Sakai | 1996-06-18 |
| 5503781 | Microencapsulation process | Masaaki Sumii | 1996-04-02 |
| 5478361 | Dyeing method | Masaaki Sumii | 1995-12-26 |
| 5432258 | Transfer paper | — | 1995-07-11 |
| 5350633 | Thermochromic composition | Masaaki Sumii, Fumiko Sakai | 1994-09-27 |
| 5350634 | Thermochromic composition | Masaaki Sumii, Fumiko Sakai | 1994-09-27 |