Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6953909 | External pipe welding apparatus | William E. Marhofer, John A. Craig, Tim Flynn | 2005-10-11 |
| 6657161 | External pipe welding apparatus | William E. Marhofer, John A. Craig, Tim Flynn | 2003-12-02 |
| 5932123 | Mobile automated pipeline welding and quality control system | William E. Marhofer, John A. Craig, Tim Flynn | 1999-08-03 |