Inventor
FOX PRESTON R
US9 patents
⚠️ This page may combine multiple inventors who share the name “FOX PRESTON R”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
VARCO INT
5 patentsUS7188547B1Mar 13, 2007
Tubular connect/disconnect apparatus
VARCO INT69 citations96
US5451129ASep 19, 1995
Pipe transfer system
VARCO INT71 citations95
US7313986B2Jan 1, 2008
Tubular-drill bit connect/disconnect apparatus
VARCO INT36 citations91
US7062991B1Jun 20, 2006
Tubular connect/disconnect apparatus
VARCO INT52 citations91
US4478111AOct 23, 1984
Suspension of adjustable pipe spinner
VARCO INT7 citations67
NAT OILWELL VARCO LP
3 patentsUS7748445B2Jul 6, 2010
Top drive with shaft seal isolation
NAT OILWELL VARCO LP6 citations51
US10081110B2Sep 25, 2018
Self-aligning pipe gripping assembly and method of making and using the same
NAT OILWELL VARCO LP0 citations47
US9452535B2Sep 27, 2016
Self-aligning pipe gripping assembly and method of making and using the same
NAT OILWELL VARCO LP0 citations47