Inventor · disambiguated record
David Coull
Also filed as: COULL DAVID · COULL DAVID A · COULL DAVID ANDERSON
4 granted patents·84 citations·filing 1989–2012
79Inventor score
Technology areasE21B
Top patents by PatentIndex Score
4 records- 0189US9004194B2Downhole tractorEDDISON ALAN MARTYN·Filed 2010·Granted Apr 14, 2015·19 cites·33 claims
- 0286US8167051B2Selective agitationEDDISON ALAN MARTYN·Filed 2007·Granted May 1, 2012·32 cites·40 claims
- 0373US9500031B2Rotary steerable drilling apparatusCOULL DAVID A·Filed 2012·Granted Nov 22, 2016·10 cites·73 claims
- 0447US4964460AShut-in toolELJAY WELL SERVICES LIMITED·Filed 1989·Granted Oct 23, 1990·23 cites·20 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →