Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4835279 | 2,6-substituted pyridine compounds | Len F. Lee | 1989-05-30 |
| 4826532 | Substituted 2,6-substituted pyridine compounds | Yuen-Lung L. Sing, Len F. Lee | 1989-05-02 |
| 4824954 | Process for preparation of substituted pyridines | — | 1989-04-25 |
| 4797149 | 2,6-substituted pyridine compounds | Len F. Lee | 1989-01-10 |