P

Inventor

DIGREGORIO DAVID

US6 patents
⚠️ This page may combine multiple inventors who share the name “DIGREGORIO DAVID”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

BAKER HUGHES INC

4 patents
US5234595AAug 10, 1993

Two-phase orbital-type wastewater treatment system and method

BAKER HUGHES INC56 citations94
US5078869AJan 7, 1992

Clarifier cleaning apparatus

BAKER HUGHES INC10 citations71
US4940545AJul 10, 1990

Aerobic waste sludge digester-thickener orbital system and method

BAKER HUGHES INC10 citations66
US4936982AJun 26, 1990

Intrachannel clarifier

BAKER HUGHES INC3 citations59

BAKER INT CORP

1 patent
US4869818ASep 26, 1989

Orbital wastewater treatment system with combined surface aerator and submerged impeller

BAKER INT CORP24 citations89

ENVIROTECH CORP

1 patent
US4275020AJun 23, 1981

Gas-liquid dissolving tank

ENVIROTECH CORP7 citations69