Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861689 | Battery element and method for making same | Naum Pinsky | 1989-08-29 |
| 4846274 | Process for recovering hydrocarbon | — | 1989-07-11 |
| 4801329 | Metal value recovery from carbonaceous ores | John W. Sibert, Arthur C. Riese | 1989-01-31 |