Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5462089 | Sheet metal duct construction providing preliminary support for corner crimping | — | 1995-10-31 |
| 5358013 | Deflection-resistant safety flange for integrally-flanged duct sections | — | 1994-10-25 |
| 5163311 | Rollformer for variable width edge profiles | Jerry A. Sostman | 1992-11-17 |