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Inventor

CHAPMAN WALTER R

US5 patents
⚠️ This page may combine multiple inventors who share the name “CHAPMAN WALTER R”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

BAKER HUGHES INC

3 patents
US7373980B2May 20, 2008

Mono-trip cement thru completion

BAKER HUGHES INC17 citations88
US7069992B2Jul 4, 2006

Mono-trip cement thru completion

BAKER HUGHES INC24 citations88
US7228897B2Jun 12, 2007

Cement through side pocket mandrel

BAKER HUGHES INC7 citations68

CHAPMAN WALTER R

2 patents
US4826134AMay 2, 1989

Intake valve for air compressors and the like

CHAPMAN WALTER R7 citations68
US3999568ADec 28, 1976

Self unloading check valve

CHAPMAN WALTER R8 citations68