Inventor · disambiguated record
John R. Spaar
Also filed as: SPAAR JOHN R
3 granted patents·132 citations·filing 1997–1998
76Inventor score
Technology areasE21B
Files withBAKER HUGHES INC3
Top patents by PatentIndex Score
3 records- 0182US6321862B1Rotary drill bits for directional drilling employing tandem gage pad arrangement with cutting elements and up-drill capabilityBAKER HUGHES INC·Filed 1998·Granted Nov 27, 2001·84 cites·63 claims
- 0254US6006845ARotary drill bits for directional drilling employing tandem gage pad arrangement with reaming capabilityBAKER HUGHES INC·Filed 1997·Granted Dec 28, 1999·32 cites·24 claims
- 0339US6112836ARotary drill bits employing tandem gage pad arrangementBAKER HUGHES INC·Filed 1997·Granted Sep 5, 2000·16 cites·26 claims
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