Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6394461 | Pressure compensated stuffing box for reciprocating pumping units | — | 2002-05-28 |
| 5343884 | Self-closing gate valve system and external self-closing actuator mechanism therefor | Wayne Gibbs | 1994-09-06 |
| 4951743 | Environmental leakage protector for recirocating rod fluid displacement arrangements | — | 1990-08-28 |
| 4745969 | In-casing hydraulic jack system | — | 1988-05-24 |
| 4653383 | Oil well sub-surface pump stroke extender | — | 1987-03-31 |