Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6328863 | Spiral feed and discharge manifold for electrolytic cells | Robert L. Wilhelm | 2001-12-11 |
| 6142698 | Telescopic tubes | — | 2000-11-07 |
| 5332116 | Ceramic fiber insulation structure with readily repairable perimeter insulation | William A. Siwierka, Alan Ruth | 1994-07-26 |