Inventor · disambiguated record
David E. Pearce
Also filed as: PEARCE DAVID E
8 granted patents·234 citations·filing 1989–1998
89Inventor score
Top patents by PatentIndex Score
8 records- 0176US4991671AMeans for mounting a roller cutter on a drill bitCAMCO INT·Filed 1990·Granted Feb 12, 1991·69 cites·10 claims
- 0259US5096005AHydraulic action for rotary drill bitsCAMCO INT·Filed 1990·Granted Mar 17, 1992·37 cites·25 claims
- 0355US6109376AFace seal having strain induced face geometryCAMCO INT·Filed 1998·Granted Aug 29, 2000·34 cites·16 claims
- 0453US5875861ADifferent stiffness energizers for MF sealsCAMCO INT·Filed 1996·Granted Mar 2, 1999·23 cites·21 claims
- 0552US5029656ANozzle means for rotary drill bitsCAMCO INT·Filed 1990·Granted Jul 9, 1991·24 cites·10 claims
- 0647US4911255AMeans for retaining roller cutters on rotary drill bitREED TOOL CO·Filed 1989·Granted Mar 27, 1990·19 cites·5 claims
- 0740US5676214AFlow channels for tooth type rolling cutter drill bitsCAMCO INT·Filed 1996·Granted Oct 14, 1997·18 cites·10 claims
- 0834US5465800ARolling cutter drill bitsCAMCO INT·Filed 1993·Granted Nov 14, 1995·10 cites·26 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →