Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6872317 | Chelate-forming filter, process for producing the same, and method of purifying liquid using the filter | Nobuyoshi Nambu, Osamu Ito, Takao Doi | 2005-03-29 |
| 6200481 | Chelate-forming fiber, process for preparing the same, and use thereof | Nobuyoshi Nambu, Osamu Ito, Koujirou Nagatsuka | 2001-03-13 |
| 5350775 | Benzopyran derivative, method for producing the same and use thereof | Yutaka Ohnishi, Naoaki Misu, Yoshimasa Ishimura | 1994-09-27 |