Inventor · disambiguated record
Donald M. Sawyer
Also filed as: SAWYER DONALD M
4 granted patents·135 citations·filing 1999–2019
78Inventor score
Technology areasE21B
Top patents by PatentIndex Score
4 records- 0180US6216802B1Gravity oriented directional drilling apparatus and methodFiled 1999·Granted Apr 17, 2001·107 cites·27 claims
- 0273US11008809B2Bent housing drilling motor with counter-rotating lower endRIVAL DOWNHOLE TOOLS LC·Filed 2019·Granted May 18, 2021·2 cites·26 claims
- 0340US6978850B2Smart clutchSAWYER DONALD M·Filed 2003·Granted Dec 27, 2005·10 cites·16 claims
- 0435US6273190B1Wellbore sidetrack plugFiled 1999·Granted Aug 14, 2001·16 cites·36 claims
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