DP

Donald R. Phelps

UN Unknown: 2 patents #12,644 of 83,584Top 20%
📍 La Cañada Flintridge, CA: #268 of 465 inventorsTop 60%
🗺 California: #247,236 of 386,348 inventorsTop 65%
Overall (All Time): #4,109,505 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4196776 Ground level waste heat recovery system John J. Fallon, Jr., Joe B. Blair, Robert P. Cabeen, III 1980-04-08