Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4754811 | Controlled retracting gasifying agent injection point process for UCG sites | Claus Sonntag | 1988-07-05 |
| 4705109 | Controlled retracting gasifying agent injection point process for UCG sites | Claus Sonntag | 1987-11-10 |
| 4209065 | Thermal-operated valve for control of coolant rate of flow in oil wells | — | 1980-06-24 |