Issued Patents All Time
Showing 76–88 of 88 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4257954 | Novel compounds, processes and marking systems | William M. Hung | 1981-03-24 |
| 4255577 | Process and intermediates for preparing 3-[4-(disubstituted-amino)phenyl] o r | William M. Hung | 1981-03-10 |
| 4251446 | Phthalide compounds, processes and marking systems | Nathan N. Crounse | 1981-02-17 |
| 4251092 | Pressure sensitive carbonless duplicating systems and thermal marking systems | William M. Hung | 1981-02-17 |
| 4243250 | Carbonless duplicating systems | William M. Hung | 1981-01-06 |
| 4220357 | Diphenylphthalide duplicating and marking systems | Nathan N. Crounse | 1980-09-02 |
| 4216263 | Magnet wire | Harold R. Otis, Charles E. Blake | 1980-08-05 |
| 4211872 | Substituted furopyridinones and furopyrazinones | William M. Hung | 1980-07-08 |
| 4209618 | Morpholinodiphenylphthalides | Nathan N. Crounse | 1980-06-24 |
| 4200313 | Carbonless duplicating systems | William M. Hung | 1980-04-29 |
| 4189171 | Marking systems containing 3-aryl-3-heterylphthalides and 3,3-bis(heteryl)phthalides | Nathan N. Crounse | 1980-02-19 |
| 4187223 | 3-[4-(Disubstituted-amino)phenyl]-3-(diphenylamino)phthalides | William M. Hung | 1980-02-05 |
| 4182714 | Carbazole containing phthalides | William M. Hung | 1980-01-08 |