Issued Patents 1982
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4363503 | Pyridine color formers | William M. Hung | 1982-12-14 |
| 4351768 | 2-[(3-Indolyl)carbonyl]-4/5-carboxybenzoic acids | Nathan N. Crounse | 1982-09-28 |
| 4343493 | Duplicating and marking systems | William M. Hung | 1982-08-10 |
| 4341402 | Systems employing indole color formers | William M. Hung | 1982-07-27 |
| 4337340 | Processes for preparing substituted furopyridinones and furopyrazinones | William M. Hung | 1982-06-29 |
| 4322352 | Indolyl phthalide compounds | Nathan N. Crounse | 1982-03-30 |
| 4321369 | Compositions, process and systems | William M. Hung | 1982-03-23 |