Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4519457 | Oil well standing valve | Ronald A. Holland, Harold L. Petrie, Frederick C. Christ | 1985-05-28 |
| 4241788 | Multiple cup downwell gas separator | — | 1980-12-30 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4519457 | Oil well standing valve | Ronald A. Holland, Harold L. Petrie, Frederick C. Christ | 1985-05-28 |
| 4241788 | Multiple cup downwell gas separator | — | 1980-12-30 |