Individual holder
DAVIS HAGGAI D
2 granted patents·63 citations·filing 1974–1985
Individually held — no corporate assignee on record.
Technology mixE21B2
Top patents by PatentIndex Score
2 records- 0164US3943997ARotary drilling apparatus and methodDAVIS HAGGAI D·Filed 1974·Granted Mar 16, 1976·30 cites·8 claims
- 0256US4640372ADiverter including apparatus for breaking up large pieces of formation carried to the surface by the drilling mudDAVIS HAGGAI D·Filed 1985·Granted Feb 3, 1987·33 cites·3 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →