Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5850424 | Refueling machine with relative positioning capability | Roy C. Challberg | 1998-12-15 |
| 5624047 | Telescoping mast with zero clearance for refueling machine | Roy C. Challberg | 1997-04-29 |
| 4844113 | Fluid flow safety valve | — | 1989-07-04 |
| 4436188 | Controlled motion apparatus | — | 1984-03-13 |