Inventor · disambiguated record

Douglas Costall

Also filed as: COSTALL DOUGLAS

2 granted patents·164 citations·filing 1996–2004

69Inventor score

Technology areasE21B

Files withCANADIAN FRACMASTER LTD1 LEADER ENERGY SERVICES CORP1

Top patents by PatentIndex Score

2 records

0186US5842530AHybrid coiled tubing/conventional drilling unitCANADIAN FRACMASTER LTD·Filed 1996·Granted Dec 1, 1998·136 cites·12 claims
0258US7207389B2Hybrid coiled tubing/fluid pumping unitLEADER ENERGY SERVICES CORP·Filed 2004·Granted Apr 24, 2007·28 cites·37 claims

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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →