Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5690177 | Fill valve | — | 1997-11-25 |
| 5680902 | Wellbore valve | Richard L. Giroux | 1997-10-28 |
| 5669443 | Shoe for used in the construction of oil and gas wells | Guus Versteeg | 1997-09-23 |
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5690177 | Fill valve | — | 1997-11-25 |
| 5680902 | Wellbore valve | Richard L. Giroux | 1997-10-28 |
| 5669443 | Shoe for used in the construction of oil and gas wells | Guus Versteeg | 1997-09-23 |