Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4194718 | Choke | Guerry L. Hahn | 1980-03-25 |
| 4193307 | Apparatus for indicating subsea well head pressure | Guerry L. Hahn | 1980-03-18 |
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4194718 | Choke | Guerry L. Hahn | 1980-03-25 |
| 4193307 | Apparatus for indicating subsea well head pressure | Guerry L. Hahn | 1980-03-18 |