Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5836065 | Extended jacket end, double expansion hydroforming | Roger A. Crawford, Wallace J. Poole, Robert A. Shaffer, Donald R. VandePolder | 1998-11-17 |
| 5673470 | Extended jacket end, double expansion hydroforming | Roger A. Crawford, Wallace J. Poole, Robert A. Shaffer, Donald R. VandePolder | 1997-10-07 |
| 5475911 | Multi-stage dual wall hydroforming | Gary L. Wells, Donald R. Rigsby | 1995-12-19 |
| 5363544 | Multi-stage dual wall hydroforming | Gary L. Wells, Donald R. Rigsby | 1994-11-15 |
| 4798076 | Nipple forming apparatus | Donald R. Rigsby, David A. Passmore | 1989-01-17 |
| 4708390 | Laser contour cut door beams | Gunther H. Palentyn, Donald R. Rigsby | 1987-11-24 |
| 4644128 | Laser contour cut manifolds | Gunther H. Palentyn, Donald R. Rigsby | 1987-02-17 |
| 4636608 | Laser contour cut door beams | Gunther H. Palentyn, Donald R. Rigsby | 1987-01-13 |