Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6871832 | Fiberglass, reinforced concrete hose shut-off valve | Gary D. Lehnhardt, Rolando Altamirano, Gerald Biever, James H. Larson | 2005-03-29 |
| 6817591 | Concrete hose shut-off valve | Gary D. Lehnhardt | 2004-11-16 |