Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6655184 | Warm/hot corrugation machine and method for corrugating low-ductility foils | Thomas Liebig, Raymond R. Listak, Robert Barry Leholm, Jeffrey K. Switzer, Peter H. Ellis +1 more | 2003-12-02 |
| 6557389 | Machine for corrugating metal foils | Ray Listak, John D. Beyer | 2003-05-06 |