Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
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Grady A. Dunham

3M: 2 patents #5,326 of 11,543Top 50%
Waterville, IA: #1 of 2 inventorsTop 50%
Iowa: #6,094 of 15,303 inventorsTop 40%
Overall (All Time): #2,036,095 of 4,157,543Top 50%
2 Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
9133296 Polyurethane foam article Elizabeth A. Sargent, David R. Dow, Douglas E. Earl, Jeffrey P. Lenzendorf 2015-09-15
8784518 Method of making polyurethane foam Elizabeth Anna Benson-Sargent, David R. Dow, Douglas E. Earl, Jeffrey P. Lenzendorf 2014-07-22