Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4519262 | Positive engagement safety mechanism and lift belt construction for long stroke, well pumping unit | Tam Dang Le | 1985-05-28 |
| 4496285 | Reciprocating drive and velocity control for long stroke well pumping unit | James W. Albert | 1985-01-29 |