Individual holder
ROBERTSON DUANE D
7 granted patents·366 citations·filing 1974–2000
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
7 records- 0197US3980325AFitting for flexible plastic pipeROBERTSON DUANE D·Filed 1974·Granted Sep 14, 1976·137 cites·5 claims
- 0290US4789189APipe saddleROBERTSON DUANE D·Filed 1987·Granted Dec 6, 1988·82 cites·12 claims
- 0385US4336652ACutting tool for flexible plastic conduitROBERTSON DUANE D·Filed 1980·Granted Jun 29, 1982·42 cites·7 claims
- 0482US6370780B1Spring-biased cutting tool for plastic pipesROBERTSON DUANE D·Filed 2000·Granted Apr 16, 2002·54 cites·10 claims
- 0569USD266736SCutting tool for flexible plastic conduitROBERTSON DUANE D·Filed 1980·Granted Nov 2, 1982·11 cites·1 claims
- 0663US6318761B1Replacement fitting for rigid, plastic pipesROBERTSON DUANE D·Filed 1999·Granted Nov 20, 2001·27 cites·29 claims
- 0744US4956916ACutting toolROBERTSON DUANE D·Filed 1988·Granted Sep 18, 1990·13 cites·4 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →