Inventor

LEHR DOUGLAS JULIUS

US3 patents

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

BAKER HUGHES INC

2 patents

US6414905B1Jul 2, 2002

Method and apparatus for communicating coded messages in a wellbore

BAKER HUGHES INC104 citations95

US9284814B2Mar 15, 2016

Downhole tool with remotely actuated drag blocks and methods

BAKER HUGHES INC1 citations46

LEHR DOUGLAS JULIUS

1 patent

US8714271B2May 6, 2014

Multi-purpose fill and circulate well tool

LEHR DOUGLAS JULIUS0 citations35