Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5558150 | Method of producing a cast multilayered alloy tube and the product thereof | — | 1996-09-24 |
| 4533405 | Tubular high strength low alloy steel for oil and gas wells | John A. Straatmann | 1985-08-06 |
| 4453986 | Tubular high strength low alloy steel for oil and gas wells | John A. Straatman | 1984-06-12 |