Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7487848 | Multi-seal for top drive shaft | Svein Stubstad, Howard Ervin, James D. Brugman, Paul Conover | 2009-02-10 |
| D333039 | Petticoat bag | Deanna K. Wells | 1993-02-09 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7487848 | Multi-seal for top drive shaft | Svein Stubstad, Howard Ervin, James D. Brugman, Paul Conover | 2009-02-10 |
| D333039 | Petticoat bag | Deanna K. Wells | 1993-02-09 |