Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5881501 | Roof system and panel therefor | Kenneth J. Guffey, Michael A. Huizinga, Russell H. Henk | 1999-03-16 |
| 5295338 | Building panel assembly | Kenneth J. Guffey, Michael A. Huizinga, Russell H. Henk | 1994-03-22 |
| 4863303 | Structural joint members for space frame system | James Fisher, Richard Letizia, LeRoy A. Lutz, Ralph F. Makowski, Richard L. Moyse +4 more | 1989-09-05 |