Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5623088 | Method of preparing 4-aminodiphenylamine | Michael K. Stern | 1997-04-22 |
| 5608111 | Method of preparing 4-aminodiphenylamine | Michael K. Stern, James Malcolm Allman, Roger Keranen Rains | 1997-03-04 |