Inventor

DE WERFF RANDY

US3 patents

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

CHAMPIONX LLC

2 patents

US12460630B2Nov 4, 2025

Valve assemblies, valve assemblies for use with downhole pumps and related methods

CHAMPIONX LLC1 citations56

US12209484B2Jan 28, 2025

Ball check-valve for linear reciprocating downhole pumps

CHAMPIONX LLC0 citations44

HARBISON FISCHER INC

1 patent

US11300121B2Apr 12, 2022

Downhole pump sand filtering snares

HARBISON FISCHER INC7 citations77