Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5990443 | Plasma torch pilot arc circuit | David A. Tatham, David M. Morris | 1999-11-23 |
| 5532918 | High power factor switched DC power supply | James F. Mayrand | 1996-07-02 |
| 5289046 | Power converter with controller for switching between primary and battery power sources | James A. Daly, Gerald J. Brand | 1994-02-22 |