Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE32642 | Pipe base well screen and system for joining a plurality of well screen segments | David C. Card, Bernard M. Hanson | 1988-04-12 |
| 4509600 | Pipe base well screen and system for joining a plurality of well screen segments | David C. Card, Bernard M. Hanson | 1985-04-09 |