DN

David D. Nagel

TE Teledrill: 1 patents #9 of 16Top 60%
Overall (All Time): #4,009,339 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4496174 Insulated drill collar gap sub assembly for a toroidal coupled telemetry system William J. McDonald, William C. Maurer 1985-01-29