Assignee
RICHARDSON ALLAN S
US·3 granted patents·213 citations·filing 1992–2013
Technology mixE21B3
Top patents by PatentIndex Score
3 records- 0194US5251709ADrilling rigRICHARDSON ALLAN S·Filed 1992·Granted Oct 12, 1993·185 cites·17 claims
- 0289USRE44956EDrilling method and apparatusRICHARDSON ALLAN S·Filed 2013·Granted Jun 24, 2014·14 cites·14 claims
- 0388USRE44973EDrilling method and apparatusRICHARDSON ALLAN S·Filed 2011·Granted Jul 1, 2014·14 cites·42 claims
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