Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5832692 | Panel construction and method for manufacturing | Kevin W. Opferbeck, Donald J. Krug | 1998-11-10 |
| 5816013 | Curved hollow panel and method for manufacture | Kevin W. Opferbeck | 1998-10-06 |