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Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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David E. Cumpstey — 2 Patents

Merck: 2 patents #3,930 of 9,382Top 45%
Cambourne, GB: #20 of 45 inventorsTop 45%
Overall (All Time): #1,709,992 of 4,157,543Top 45%
2 Patents All Time
David E. Cumpstey has been granted 2 US patents while listed as an inventor at Merck. The first was granted in 1996 and the most recent in June 1997. David E. Cumpstey ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list David E. Cumpstey in Cambourne, GB.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
5638657 System and method for automatically feeding, inspecting and diverting tablets for continuous filling of tablet containers John R. Archer, Richard H. Gray, Stephen Owen 1997-06-17 $146,641,000
5522512 System and method for automatically feeding, inspecting and diverting tablets for continuous filling of tablet containers John R. Archer, Richard H. Gray, Stephen Owen 1996-06-04 $67,724,000