Inventor · disambiguated record
Duane D. Papke
Also filed as: PAPKE DUANE D
4 granted patents·185 citations·filing 1986–1987
81Inventor score
Technology areasE21B
Files withOIL PATCH GROUP INC4
Top patents by PatentIndex Score
4 records- 0183US4792000AMethod and apparatus for well drillingOIL PATCH GROUP INC·Filed 1987·Granted Dec 20, 1988·77 cites·4 claims
- 0270US4776410AStabilizing tool for well drillingOIL PATCH GROUP INC·Filed 1987·Granted Oct 11, 1988·44 cites·12 claims
- 0362US4709462AMethod for assembling a well drilling toolOIL PATCH GROUP INC·Filed 1986·Granted Dec 1, 1987·33 cites·5 claims
- 0459US4765417AReaming apparatus for well drillingOIL PATCH GROUP INC·Filed 1987·Granted Aug 23, 1988·31 cites·5 claims
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