Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886659 | Color production | Paul K. Filby, Marek P. J. Kierstan | 1989-12-12 |
| 4818535 | Repellent compositions | Christopher G. Faulkes, Andrew J. Tomlinson, Peter C. Y. K. Ning | 1989-04-04 |