Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5542177 | Boiler tube bank repair | — | 1996-08-06 |
| 5356248 | Boiler tube bank repair | — | 1994-10-18 |
| 5033347 | Boiler tube cutting apparatus | Tollief O. Hillestad | 1991-07-23 |
| 5007778 | Portable power tool for milling tube ends | Tollief O. Hillestad | 1991-04-16 |
| 4915552 | Portable power tool for milling tube ends | Tollief O. Hillestad | 1990-04-10 |
| 4889454 | Portable power tool for milling tube ends | Tollief O. Hillestad | 1989-12-26 |