WH

Wayne A. Helmer

US USDA: 1 patents #1,162 of 2,828Top 45%
📍 Carbondale, IL: #70 of 142 inventorsTop 50%
🗺 Illinois: #48,934 of 84,256 inventorsTop 60%
Overall (All Time): #4,029,735 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4432147 Energy efficient lumber dry kiln using solar collectors and refrigeration system Peter Chen, Howard N. Rosen 1984-02-21