Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6010819 | Method for improving light fastness of images, and image forming material | Hiroshi Arakatsu, Nobuo Seto, Yoshisada Nakamura, Hiroyuki Watanabe, Takayoshi Kamio | 2000-01-04 |
| 5731140 | Pyrazolylazophenol dye | Takayoshi Kamio, Nobuo Seto | 1998-03-24 |