Individual holder
SHIRLEY KIRK R
3 granted patents·216 citations·filing 1980–1990
Individually held — no corporate assignee on record.
Technology mixE21B3
Top patents by PatentIndex Score
3 records- 0190US4394881ADrill steering apparatusSHIRLEY KIRK R·Filed 1980·Granted Jul 26, 1983·121 cites·27 claims
- 0278US4635736ADrill steering apparatusSHIRLEY KIRK R·Filed 1985·Granted Jan 13, 1987·63 cites·9 claims
- 0355US5038872ADrill steering apparatusSHIRLEY KIRK R·Filed 1990·Granted Aug 13, 1991·32 cites·8 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →