DS

Douglass E. Simpson

📍 Vancouver, CA: #1,542 of 5,070 inventorsTop 35%
Overall (All Time): #1,609,171 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
6539889 Frame, inflatable skin and watercraft formed from same — 2003-04-01
4274170 Collapsible kayak — 1981-06-23
4241950 Folding chair — 1980-12-30