Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
DE

Douglas E. Earl

3M: 3 patents #4,214 of 11,543Top 40%
Windom, MN: #1,009 of 2,819 inventorsTop 40%
Minnesota: #19,064 of 52,454 inventorsTop 40%
Overall (All Time): #1,522,885 of 4,157,543Top 40%
3 Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
9133296 Polyurethane foam article Elizabeth A. Sargent, David R. Dow, Grady A. Dunham, Jeffrey P. Lenzendorf 2015-09-15
8784518 Method of making polyurethane foam Elizabeth Anna Benson-Sargent, David R. Dow, Grady A. Dunham, Jeffrey P. Lenzendorf 2014-07-22
5512009 Method and apparatus for attenuating optical chatter marks on a finished surface 1996-04-30