FD

Frederick C. Duthweiler

UC Union Oil Company Of California: 2 patents #143 of 385Top 40%
📍 Anchorage, AK: #133 of 588 inventorsTop 25%
🗺 Alaska: #269 of 1,355 inventorsTop 20%
Overall (All Time): #2,343,571 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4676695 Method for preventing thaw settlement along offshore artic pipelines — 1987-06-30
4192630 Method and apparatus for building ice islands — 1980-03-11