Inventor

DUFRENE PHILIP E

US3 patents

Patents

3 patents

US10538975B2Jan 21, 2020

Low profile stop collar

WEATHERFORD TECH HOLDINGS LLC2 citations65

US11085248B2Aug 10, 2021

Centralizer

WEATHERFORD TECH HOLDINGS LLC0 citations53

US10280695B2May 7, 2019

Centralizer

WEATHERFORD TECH HOLDINGS LLC1 citations53