Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4750920 | Single pass mud rejuvenation system and method | Herman J. Schellstede | 1988-06-14 |
| 4384612 | Blowout preventer control apparatus | Jack Bradford | 1983-05-24 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4750920 | Single pass mud rejuvenation system and method | Herman J. Schellstede | 1988-06-14 |
| 4384612 | Blowout preventer control apparatus | Jack Bradford | 1983-05-24 |