Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6309145 | Portable machine tool for conditioning header tube openings for butt-welding tubes | Jerald VanderPol | 2001-10-30 |
| 6202522 | Portable pipe end preparation machine tool | — | 2001-03-20 |
| 6050161 | Portable single-point beveling tool | — | 2000-04-18 |
| 6038947 | Quick return feed for machine tool | — | 2000-03-21 |
| D413906 | Tube end machining tool | — | 1999-09-14 |
| 5934688 | Quick setting and release actuator for work holder | Jerald VanderPol, Mark A. Marshall, Donald T. Stanley | 1999-08-10 |
| 5826470 | Cam operated quick return feed control for lathe machine tool | — | 1998-10-27 |
| 5743539 | Quick setting and release actuator for work holder | Jerald VanderPol, Mark A. Marshall, Donald T. Stanley | 1998-04-28 |
| 5738268 | Method for preparing tube weld sample for internal visual inspection | Jerald VanderPol | 1998-04-14 |
| 5429021 | Elliptical manway cutter | Henry Astle | 1995-07-04 |
| 5368399 | Adjustable bearing assembly | — | 1994-11-29 |