Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6488867 | Organic fluorescent whitening pigment composition having an excellent hiding power | Shigekazu Matsumoto, Takao Yanagisawa, Shigehiro Matsumoto | 2002-12-03 |
| 6140477 | Near-infrared ray absorbing polyazo compound | Shigekazu Matsumoto, Takao Yanagisawa, Shigehiro Matsumoto | 2000-10-31 |