Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5628581 | Sheet metal construction system | Craig S. Ludwig, Laird I. Richardson | 1997-05-13 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5628581 | Sheet metal construction system | Craig S. Ludwig, Laird I. Richardson | 1997-05-13 |