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USPTO Patent Rankings Data through Dec 31, 2025
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John Shackleton — 2 Patents

DODowco: 1 patents #25 of 34Top 75%
Baltimore, CA: #4 of 6 inventorsTop 70%
Overall (All Time): #1,709,992 of 4,157,543Top 45%
2 Patents All Time
John Shackleton has been granted 2 US patents while listed as an inventor at Dowco. The first was granted in 1983 and the most recent in October 2017. John Shackleton ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list John Shackleton in Baltimore, ON, CA.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
9783267 Cover system Jon Alexander, Bradley Prey, Mark T. Sterwald 2017-10-10
4383876 Barrier sheet and method of manufacturing same 1983-05-17