Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4362325 | Limited angle piggable swivel | W. Robert Wolfram, Jr. | 1982-12-07 |
| 4311327 | Universal joint for multiple flowline system | Clarence F. Stelzer, Jr., Donald R. Hayes | 1982-01-19 |