Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6296561 | Air return bulkhead for temperature controlled trailers | David B. Ziegler, Pat Hotch, Gregg George, Kevin W. Kiefer, Randal Gast | 2001-10-02 |
| 5427237 | Shipping crate and air return bulkhead for a transport refrigeration unit | Kevin W. Kiefer, Randal Gast | 1995-06-27 |