PH

Paul Hilliard

NL National Oilwell (U.K.) Limited: 1 patents #2 of 5Top 40%
Overall (All Time): #1,553,292 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
8201633 Switchable circulating tool — 2012-06-19
6338504 Connector — 2002-01-15
5199513 Side-tracking mills David Joel STEWART, Thomas S. Doig 1993-04-06