Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6103389 | Thermal transfer recording medium | Yoshiaki Kumazawa | 2000-08-15 |
| 5964976 | Thermal-transfer recording medium and thermal transfer recording method | Yoshiaki Kumazawa, Hiroyuki Aimoto | 1999-10-12 |
| 4840837 | Heat transfer medium | Masami Tokunaga, Tsuyoshi Tanaka, Satoshi Koyama, Keiichi Kikuchi | 1989-06-20 |
| 4760104 | Erasable ball-point pen ink | Tamotsu Miyajima, Nobuto Saito | 1988-07-26 |
| 4687791 | Erasable ball-point pen ink | Tamotsu Miyajima, Nobuto Saito | 1987-08-18 |
| 4629748 | Erasable ball-point pen ink | Tamotsu Miyajima, Nobuto Saito | 1986-12-16 |
| 4606769 | Erasable black ink composition for ball-point pens | Hiroshi Sato, Nobuto Saitoh, Katsumi Hirano, Kazuhiko Honda | 1986-08-19 |