Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889947 | Ultraviolet radiation absorbing naphthalenylidene compositions | Charalambos J. Phalangas | 1989-12-26 |
| 4847073 | Ultraviolet radiation absorbing cyclohexenylidene method | Donald J. Gosciniak, Charalambos J. Phalangas | 1989-07-11 |