Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4218432 | Coloring agent and a composition including the same for coloring toilet bowl flushing water | Koichi Watanabe, Hiroaki Harada | 1980-08-19 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4218432 | Coloring agent and a composition including the same for coloring toilet bowl flushing water | Koichi Watanabe, Hiroaki Harada | 1980-08-19 |