Inventor

ERVIN HOWARD

US4 patents

⚠️ This page may combine multiple inventors who share the name “ERVIN HOWARD”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

VARCO INT

2 patents

US7487848B2Feb 10, 2009

Multi-seal for top drive shaft

VARCO INT21 citations89

US7784834B2Aug 31, 2010

Clamp apparatus for threadedly connected tubulars

VARCO INT4 citations59

YATER RONALD W

1 patent

US8448320B2May 28, 2013

Clamp apparatus for threadedly connected tubulars

YATER RONALD W7 citations76

NAT OILWELL VARCO LP

1 patent

US10557540B2Feb 11, 2020

Fleet angle tolerant sheave

NAT OILWELL VARCO LP2 citations68