Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6083453 | Tundish having fume collection provisions | David J. Diederich, George R. Petrilla, Donald K. Mounsey | 2000-07-04 |
| 6077473 | Torch cutting enclosure having fume collection provisions | David J. Diederich, Earl A. Burkey, Ralph Dybiec | 2000-06-20 |
| 6071467 | Technique and apparatus for ladle cleanout | Fred H. Vandersluis, David J. Diederich | 2000-06-06 |
| 6036914 | Dumping bay with fume collecting provisions | David J. Diederich, Thomas F. Bernarding, Donald M. Watkins | 2000-03-14 |
| 6017486 | Comprehensive fume collection system for production of leaded steel | David J. Diederich, Ralph Dybiec, Donald E. Kocka, Thomas F. Bearding | 2000-01-25 |
| 5993727 | Fume collecting ladle cover | David J. Diederich, Kenneth K. Krol, Ralph Dybiec | 1999-11-30 |
| 4711429 | Tundish for mixing alloying elements with molten metal | David J. Diederich | 1987-12-08 |