Inventor

JOHNSON DARRELL

US5 patents

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

WEATHERFORD LAMB

2 patents

US7178600B2Feb 20, 2007

Apparatus and methods for utilizing a downhole deployment valve

WEATHERFORD LAMB75 citations94

US7278497B2Oct 9, 2007

Method for extracting coal bed methane with source fluid injection

WEATHERFORD LAMB1 citations42

VALENITE INC

2 patents

US5713133AFeb 3, 1998

Methods of preparing cemented metal carbide substrates for deposition of adherent diamond coatings and products made therefrom

VALENITE INC40 citations90

US5560839AOct 1, 1996

Methods of preparing cemented metal carbide substrates for deposition of adherent diamond coatings and products made therefrom

VALENITE INC33 citations90

(unassigned)

1 patent

US6114847ASep 5, 2000

Connectionless signal detection device for conductive cables

23 citations89