Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4639750 | Fluoran compounds and marking systems | William M. Hung | 1987-01-27 |
| 4447616 | Pyridine containing benzoic acid derivatives | William M. Hung | 1984-05-08 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4639750 | Fluoran compounds and marking systems | William M. Hung | 1987-01-27 |
| 4447616 | Pyridine containing benzoic acid derivatives | William M. Hung | 1984-05-08 |