Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Doug Kellam — 2 Patents in 2019

ZTZero E Technologies: 2 patents #5 of 10Top 50%
Oak Brook, IL: #6 of 33 inventorsTop 20%
Illinois: #1,558 of 9,120 inventorsTop 20%
Overall (2019): #177,231 of 560,194Top 35%
2 Patents 2019

Issued Patents 2019

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
10435313 Systems, devices, and methods of water filtration Rajan G. Rajan, Liu Wei, Ajit Dighe, Charles Lieppe 2019-10-08
D840736 Glass water dispenser Anthony Petruzzi 2019-02-19