DP

David W. Purnhagen

US Underground Systems: 1 patents #9 of 13Top 70%
📍 Bayport, NY: #21 of 44 inventorsTop 50%
🗺 New York: #67,335 of 115,490 inventorsTop 60%
Overall (All Time): #2,942,998 of 4,157,543Top 75%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
9638586 Dynamic wide-area earth thermal properties and earth ambient temperature determination system Chunchuan Xu, Paul A. Alex 2017-05-02