Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5178363 | Valve stem sealing means for prevention of fugitive emissions | Stephen M. Horvath | 1993-01-12 |
| 5129624 | Valve stem sealing means for prevention of fugitive emissions | Stephen M. Horvath | 1992-07-14 |