Inventor · disambiguated record
Douglass E. Simpson
Also filed as: SIMPSON DOUGLASS E · SIMPSON DOUGLASS EDWARD
3 granted patents·78 citations·filing 1978–2001
74Inventor score
Files withSIMPSON DOUGLASS E2
Top patents by PatentIndex Score
3 records- 0182US4274170ACollapsible kayakSIMPSON DOUGLASS E·Filed 1978·Granted Jun 23, 1981·37 cites·16 claims
- 0273US6539889B2Frame, inflatable skin and watercraft formed from sameFiled 2001·Granted Apr 1, 2003·19 cites·80 claims
- 0357US4241950AFolding chairSIMPSON DOUGLASS E·Filed 1979·Granted Dec 30, 1980·22 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →