Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5351631 | Removable damper for chemical recovery furnace | Robert B. Hill, Kenneth A. Pingel | 1994-10-04 |
| 5307745 | Removable damper for chemical recovery furnace | Robert B. Hill, Kenneth A. Pingel | 1994-05-03 |