DL

Duane D. Logsdon

TF The Logsdon Foundation: 11 patents #1 of 2Top 50%
📍 Fullerton, CA: #14 of 1,038 inventorsTop 2%
🗺 California: #19,737 of 386,348 inventorsTop 6%
Overall (All Time): #148,214 of 4,157,543Top 4%
27
Patents All Time

Issued Patents All Time

Showing 26–27 of 27 patents

Patent #TitleCo-InventorsDate
4215724 Backflow preventer for sewer system — 1980-08-05
4212486 Water closet protector stabilizer — 1980-07-15