Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873616 | Power supply for arc lamps | William Fredrick, Robert G. Brent | 1989-10-10 |
| 4873618 | Power supply for D.C. arc lamps | William Fredrick, Robert G. Brent | 1989-10-10 |
| 4269687 | Electrode suspension bars | John R. Gilbert | 1981-05-26 |