Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5660043 | Torch assembly | William C. Pfefferle | 1997-08-26 |
| 5636511 | Torch assembly | William C. Pfefferle, Greg Jackson | 1997-06-10 |
| 5634784 | Catalytic method | William C. Pfefferle | 1997-06-03 |