Inventor · disambiguated record
Paul E. Helfer
Also filed as: HELFER PAUL E
6 granted patents·277 citations·filing 1974–1997
86Inventor score
Top patents by PatentIndex Score
6 records- 0188US6016880ARotating drilling head with spaced apart sealsVETCO GRAY INC ABB·Filed 1997·Granted Jan 25, 2000·145 cites·20 claims
- 0285US4057887APipe disconnecting apparatusCAMERON IRON WORKS INC·Filed 1976·Granted Nov 15, 1977·39 cites·41 claims
- 0377US4638972AValve apparatusKOOMEY·Filed 1985·Granted Jan 27, 1987·39 cites·9 claims
- 0462US3957113APipe disconnecting apparatusCAMERON IRON WORKS INC·Filed 1974·Granted May 18, 1976·23 cites·8 claims
- 0546US4152015ACasing hangerCAMERON IRON WORKS INC·Filed 1977·Granted May 1, 1979·13 cites·7 claims
- 0643US4655431ARam-type blowout preventerHELFER PAUL E·Filed 1985·Granted Apr 7, 1987·18 cites·9 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →