Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4477105 | Collet actuated ball and socket connector | Robert H. Wittman, Arthur H. T. Chin | 1984-10-16 |
| 4465104 | Pressure energized pipeline plug | Robert H. Wittman, Ronnie E. Haws | 1984-08-14 |
| 4422477 | Pressure energized pipeline plug | Robert H. Wittman, Ronnie E. Haws | 1983-12-27 |
| 4332277 | Pipeline pigging plug | Arthur H. T. Chin, Ronnie E. Haws, Robert H. Wittman | 1982-06-01 |