Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5205355 | Subsurface safety valves and method and apparatus for their operation | Phillip S. Sizer, Imre I. Gazda | 1993-04-27 |
| 5170845 | Subsurface safety valves and method and apparatus for their operation | Phillip S. Sizer, Imre I. Gazda | 1992-12-15 |