Assignee
JOHNSON MARK O
US·2 granted patents·5 citations·filing 2009–2010
Technology mixE21B2
Top patents by PatentIndex Score
2 records- 0161US8720559B2Cementing method and apparatus for use with running string having an obstructionJOHNSON MARK O·Filed 2010·Granted May 13, 2014·3 cites·18 claims
- 0247US8307898B2Method and apparatus for cementing a liner in a borehole using a tubular member having an obstructionJOHNSON MARK O·Filed 2009·Granted Nov 13, 2012·2 cites·41 claims
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