Inventor

GRASSMANN DARIN

US3 patents

Patents

3 patents

US10309564B1Jun 4, 2019

Extendable spool

OIL STATES ENERGY SERVICES LLC7 citations82

US11214455B2Jan 4, 2022

Extendable spool

OIL STATES ENERGY SERVICES LLC4 citations71

US11168528B2Nov 9, 2021

Universal atmospheric deployment device

OIL STATES ENERGY SERVICES LLC3 citations71