Assignee
INGRAHAM DEREK
US·4 granted patents·16 citations·filing 2009–2012
Technology mixE21B4
Top patents by PatentIndex Score
4 records- 0169US9062520B2Retrievable cementing bushing systemINGRAHAM DEREK·Filed 2012·Granted Jun 23, 2015·3 cites·9 claims
- 0260US8393404B2Downhole multiple bore rotary diverter apparatusINGRAHAM DEREK·Filed 2010·Granted Mar 12, 2013·2 cites·25 claims
- 0356US8256517B2Downhole multiple bore tubing apparatusINGRAHAM DEREK·Filed 2009·Granted Sep 4, 2012·8 cites·21 claims
- 0450US8286699B2Multiple production string apparatusINGRAHAM DEREK·Filed 2009·Granted Oct 16, 2012·3 cites·22 claims
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