Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5198584 | P-phenylenediamine substituted by a quaternary ammonium group and an electron withdrawing group | A. C. Chan, Y. G. Pan | 1993-03-30 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5198584 | P-phenylenediamine substituted by a quaternary ammonium group and an electron withdrawing group | A. C. Chan, Y. G. Pan | 1993-03-30 |