Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4579175 | Method of reducing water production | Hartwig Volz | 1986-04-01 |
| 4282930 | Process for the recovery of petroleum from subterranean formations | Hartwig Volz | 1981-08-11 |
| 4214475 | Adapter for a sensitive viscometer | Walter H. Carter, Charles A. Christopher | 1980-07-29 |
| 4212794 | Aqueous drilling fluid | Alfred Schulz | 1980-07-15 |