Issued Patents All Time
Showing 26–26 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4480693 | Fluid loss control in oil field cements | Robert C. Portnoy, Donald N. Schulz, Kissho Kitano | 1984-11-06 |
Showing 26–26 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4480693 | Fluid loss control in oil field cements | Robert C. Portnoy, Donald N. Schulz, Kissho Kitano | 1984-11-06 |