Inventor · disambiguated record
Frank Harold Hollister
Also filed as: HOLLISTER FRANK HAROLD
11 granted patents·2 pending applications·18 citations·filing 2012–2024
86Inventor score
Top patents by PatentIndex Score
13 records- 0193US10054239B2Subsea BOP control system with dual-action check valveNAT COUPLING CO INC·Filed 2017·Granted Aug 21, 2018·5 cites·17 claims
- 0291US10174857B2Subsea BOP control system with dual-action check valveNAT COUPLING CO INC·Filed 2018·Granted Jan 8, 2019·4 cites·5 claims
- 0390US9810336B2Subsea BOP control system with dual-action check valveNAT COUPLING CO INC·Filed 2016·Granted Nov 7, 2017·5 cites·16 claims
- 0487US12173576B2Regulator having check valve manifold for use in subsea control circuitNAT COUPLING CO INC·Filed 2023·Granted Dec 24, 2024·1 cites·22 claims
- 0584US10415715B2Subsea BOP control system with dual-action check valveNAT COUPLING CO INC·Filed 2018·Granted Sep 17, 2019·2 cites·4 claims
- 0675US2025092753A1Regulator having check valve manifold for use in subsea control circuitNAT COUPLING CO INC·Filed 2024·Application pending·0 cites
- 0771US11905782B2Regulator having check valve manifold for use in subsea control circuitNAT COUPLING CO INC·Filed 2023·Granted Feb 20, 2024·0 cites·31 claims
- 0869US10288184B2Metal reinforced seal plate for pilot actuated spool valveHUNTING ENERGY SERVICES INC·Filed 2015·Granted May 14, 2019·1 cites·6 claims
- 0964US11105435B2Subsea bop control system with dual-action check valveNAT COUPLING CO INC·Filed 2019·Granted Aug 31, 2021·0 cites·22 claims
- 1056US9822895B2Metal reinforced seal plate for pilot actuated spool valveHUNTING ENERGY SERVICES INC·Filed 2017·Granted Nov 21, 2017·0 cites·12 claims
- 1154US10247322B2Metal reinforced seal plate for pilot actuated spool valveNAT COUPLING COMPANY·Filed 2017·Granted Apr 2, 2019·0 cites·4 claims
- 1250US2013319557A1Metal Reinforced Seal Plate for Pilot Actuated Spool ValveHUNTING ENERGY SERVICES INC·Filed 2012·Application pending·0 cites
- 1346US11085545B2Pilot-actuated spool valve having rod retainerNAT COUPLING CO INC·Filed 2019·Granted Aug 10, 2021·0 cites·22 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →