Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847441 | Difluorotetrachlorophenanthrenes | Carl W. Mayer | 1989-07-11 |
| 4801701 | Difluorinated (5,6,11,12-tetraselenotetracene)2 halides, the preparation thereof and the use thereof | Carl W. Mayer | 1989-01-31 |