Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6623556 | Near-infrared transmitting black azo pigments | Yoshiyuki Zama, Hisao Okamoto, Hiromitsu Yanagimoto, Yoshio Abe, Michiei Nakamura | 2003-09-23 |
| 6471766 | Pigment dispersants and pigment compositions containing the same | Shigeru Ohki, Takayuki Soga, Kazutaka Aoki, Shotoku Takami, Hisao Okamoto +1 more | 2002-10-29 |