Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5492618 | Recovery of hard acids and soft bases from decomposed coal | George M. Kramer, Edwin R. Ernst | 1996-02-20 |
| 5489376 | Recovery of hard acids and soft bases from decomposed coal | George M. Kramer, Edwin R. Ernst | 1996-02-06 |
| 5489377 | Recovery of hard acids and soft bases from decomposed coal | George M. Kramer | 1996-02-06 |