Individual holder
FRIEL DANIEL D
US·4 granted patents·1 pending application·277 citations·filing 1984–2008
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
5 records- 0198US4627194AMethod and apparatus for knife and blade sharpeningFRIEL DANIEL D·Filed 1984·Granted Dec 9, 1986·90 cites·17 claims
- 0297US4716689AMethods and apparatus for knife and blade sharpeningFRIEL DANIEL D·Filed 1986·Granted Jan 5, 1988·85 cites·9 claims
- 0396USD310620SKnife sharpenerFRIEL DANIEL D·Filed 1988·Granted Sep 18, 1990·53 cites·1 claims
- 0491US4897965AKnife sharpening apparatusFRIEL DANIEL D·Filed 1989·Granted Feb 6, 1990·49 cites·7 claims
- 0551US2008257802A1Advanced household water purification meansFRIEL DANIEL D·Filed 2008·Application pending·0 cites
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →