Assignee

GEARHART MARVIN

US·1 granted patent·1 pending application·158 citations·filing 1993–2009

Technology mixE21B2

Top patents by PatentIndex Score

2 records

0186US5289889ARoller cone core bit with spiral stabilizersGEARHART MARVIN·Filed 1993·Granted Mar 1, 1994·158 cites·5 claims
0232US2010025111A1Direct Drive MWD ToolGEARHART MARVIN·Filed 2009·Application pending·0 cites

Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →