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

Merck: 1 patents #5,440 of 9,382Top 60%
Lansdale, PA: #535 of 839 inventorsTop 65%
Pennsylvania: #43,533 of 74,527 inventorsTop 60%
Overall (All Time): #2,406,284 of 4,157,543Top 60%
1 Patents All Time
Andy Duff has been granted 1 US patent while listed as an inventor at Merck. All of these patents were granted in 1996. Andy Duff ranks #2,406,284 of 4,157,543 US inventors in our database (top 57.9%). Patent records list Andy Duff in Lansdale, PA, US.

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
5504332 Method and system for determining the homogeneity of tablets Eric Richmond, Bruce R. Buchanan, Mark A. Baxter, Oksana M. Tully, Samuel A. Thornton 1996-04-02 $135,641,000