Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6055913 | Coal spreader with swirl vanes | David W. Gerber | 2000-05-02 |
| 5676193 | Cast abrasion resistant hollow balls | — | 1997-10-14 |
| 5667154 | Cast abrasion resistant hollow balls | — | 1997-09-16 |
| 5547521 | Heat treatment method for lost foam cast materials | — | 1996-08-20 |
| 5429172 | Lost foam process for casting low carbon stainless steel | — | 1995-07-04 |
| 5346148 | Asymmetric pulverizer tire | Ronald D. Mizak, Robert R. Piepho | 1994-09-13 |