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Inventor

HELFER PAUL E

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

CAMERON IRON WORKS INC

3 patents
US4057887ANov 15, 1977

Pipe disconnecting apparatus

CAMERON IRON WORKS INC39 citations91
US3957113AMay 18, 1976

Pipe disconnecting apparatus

CAMERON IRON WORKS INC23 citations81
US4152015AMay 1, 1979

Casing hanger

CAMERON IRON WORKS INC13 citations72

VETCO GRAY INC ABB

1 patent
US6016880AJan 25, 2000

Rotating drilling head with spaced apart seals

VETCO GRAY INC ABB145 citations96

KOOMEY

1 patent
US4638972AJan 27, 1987

Valve apparatus

KOOMEY39 citations88

HELFER PAUL E

1 patent
US4655431AApr 7, 1987

Ram-type blowout preventer

HELFER PAUL E18 citations68