Inventor · disambiguated record

David W. Purnhagen

Also filed as: PURNHAGEN DAVID W

1 granted patent·0 citations·filing 2014–2014

9Inventor score

Technology areasG01K

Files withUNDERGROUND SYSTEMS INC1

Top patents by PatentIndex Score

1 record

0144US9638586B2Dynamic wide-area earth thermal properties and earth ambient temperature determination systemUNDERGROUND SYSTEMS INC·Filed 2014·Granted May 2, 2017·0 cites·12 claims

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