Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5244469 | Process for preparation of black coloring materials and application thereof: chitosan treated with black extract of lithospermum root | Susumu Shimoyama, Yasuko Noda, Ujo Maeda, Tasuku Shimoyama, Kunio Kataoka +5 more | 1993-09-14 |