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Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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David Eugene Robertson — 2 Patents in 2021

RBRain Bird: 2 patents #3 of 57Top 6%
Glendora, CA: #7 of 33 inventorsTop 25%
California: #13,721 of 66,859 inventorsTop 25%
Overall (2021): #168,177 of 548,734Top 35%
2 Patents 2021

Issued Patents 2021

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
11154881 Rotary nozzle Samuel C. Walker, Lee James Shadbolt 2021-10-26
11000866 Rotary nozzles and deflectors Lee James Shadbolt 2021-05-11