Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855144 | Synthetic melanin aggregates | Helen Leong, Martin Katz, Ann Delk, David L. Berliner | 1989-08-08 |
| 4806360 | Synthetic melanin aggregates | Helen Leong, Martin Katz, Anne Delk, David L. Berliner | 1989-02-21 |