Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4844510 | Tubular connector | David H. Theiss | 1989-07-04 |
| 4823871 | Hanger and seal assembly | David H. Theiss | 1989-04-25 |
| 4496162 | Well sealing assembly having resilient seal ring with metal end caps | James Lewandowski | 1985-01-29 |
| 4474381 | Metal pipe joint seal ring with port to control erosion | Robert Lee Wilkins, Eugene J. Cegielski, Edward J. Szymczak | 1984-10-02 |