Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Keith Duff — 1 Patent

SUSupelco: 1 patents #7 of 14Top 50%
Howard, PA: #7 of 12 inventorsTop 60%
Pennsylvania: #43,533 of 74,527 inventorsTop 60%
Overall (All Time): #2,406,284 of 4,157,543Top 60%
1 Patents All Time
Keith Duff has been granted 1 US patent while listed as an inventor at Supelco. All of these patents were granted in 1994. Keith Duff ranks #2,406,284 of 4,157,543 US inventors in our database (top 57.9%). Patent records list Keith Duff in Howard, PA, US.

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
5338454 Chiral mobile phase additives for improved liquid-chromatography separations 1994-08-16 $7,048,000