Inventor

JOHNSON JR WADE M

4 patents

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

WESTERN ATLAS INT INC

2 patents

US4893505AJan 16, 1990

Subsurface formation testing apparatus

WESTERN ATLAS INT INC145 citations93

US4736300AApr 5, 1988

Automatic gain control of formation measurements by varying induced current flow

WESTERN ATLAS INT INC11 citations70

SCHLUMBERGER TECHNOLOGY CORP

1 patent

US3940689AFeb 24, 1976

Combined eddy current and leakage field detector for well bore piping using a unique magnetizer core structure

SCHLUMBERGER TECHNOLOGY CORP94 citations93

DRESSER IND

1 patent

US4514809AApr 30, 1985

Dynamic range control of electrode pad current in well logging tools

DRESSER IND11 citations72