Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5224774 | Concrete additive product and method of use | Stephen A. Valle, John E. Sorenson, Walter W. Wydra | 1993-07-06 |
| 5203629 | Method for modifying concrete properties | Stephen A. Valle, John E. Sorenson, Walter W. Wydra | 1993-04-20 |