Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4644727 | Strand chair for supporting prestressing cable and cross-mesh in elongated precast concrete plank | David W. Hanson, Richard R. Koehn, Richard C. Nash | 1987-02-24 |
| 4360333 | Aggregate exposing machine | David W. Hanson, Richard C. Nash | 1982-11-23 |