Inventor · disambiguated record
David P. Herd
Also filed as: HERD DAVID · HERD DAVID P · HERD DAVID PAUL
12 granted patents·3 pending applications·746 citations·filing 1973–2017
94Inventor score
Files withMCEVOY OILFIELD EQUIPMENT CO5SMITH INTERNATIONAL4UNIV HERIOT WATT2EXXON PRODUCTION RESEARCH CO1STEWART & STEVENSON OILTOOLS I1
Top patents by PatentIndex Score
15 records- 0198US4340204AHigh pressure gate valve with preloaded, stacked, solid lubricated stem sealsSMITH INTERNATIONAL·Filed 1977·Granted Jul 20, 1982·113 cites·12 claims
- 0294US3933338ABalanced stem fail-safe valve systemEXXON PRODUCTION RESEARCH CO·Filed 1974·Granted Jan 20, 1976·67 cites·12 claims
- 0392US4053023AUnderwater well completion method and apparatusMCEVOY OILFIELD EQUIPMENT CO·Filed 1974·Granted Oct 11, 1977·74 cites·9 claims
- 0491US4451047ASealSMITH INTERNATIONAL·Filed 1982·Granted May 29, 1984·115 cites·20 claims
- 0590US4029294AHigh pressure valveMCEVOY OILFIELD EQUIPMENT CO·Filed 1974·Granted Jun 14, 1977·60 cites·15 claims
- 0689US3993100AHydraulic control system for controlling a plurality of underwater devicesSTEWART & STEVENSON OILTOOLS I·Filed 1975·Granted Nov 23, 1976·132 cites·12 claims
- 0788US4294284AFail-safe, non-pressure locking gate valveSMITH INTERNATIONAL·Filed 1979·Granted Oct 13, 1981·70 cites·2 claims
- 0885US3971576AUnderwater well completion method and apparatusMCEVOY OILFIELD EQUIPMENT CO·Filed 1973·Granted Jul 27, 1976·46 cites·9 claims
- 0978US3974875AUnderwater well completion method and apparatusMCEVOY OILFIELD EQUIPMENT CO·Filed 1974·Granted Aug 17, 1976·31 cites·4 claims
- 1077US4272055ASingle double backseatMCEVOY OILFIELD EQUIPMENT CO·Filed 1978·Granted Jun 9, 1981·28 cites·34 claims
- 1162US10024806B2Microwave cavity sensorUNIV HERIOT WATT·Filed 2013·Granted Jul 17, 2018·1 cites·19 claims
- 1241US4685655APressure-balanced gate for split-gate valveSMITH INTERNATIONAL·Filed 1986·Granted Aug 11, 1987·9 cites·17 claims
- 1338US2004001483A1Distribution and reconstruction of AD-HOC timing signalsFiled 2002·Application pending·0 cites
- 1436US2019257770A1Microwave sensorUNIV HERIOT WATT·Filed 2017·Application pending·0 cites
- 1534US2005067167A1Radial penetrator assembly and methodFiled 2003·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →