DP

David W. Purnhagen

US Underground Systems: 1 patents #1 of 3Top 35%
📍 Bayport, NY: #1 of 5 inventorsTop 20%
🗺 New York: #4,556 of 12,278 inventorsTop 40%
Overall (2017): #445,950 of 506,227Top 90%
1
Patents 2017

Issued Patents 2017

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