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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 #	Title	Co-Inventors	Date
11154881	Rotary nozzle	Samuel C. Walker, Lee James Shadbolt	2021-10-26
11000866	Rotary nozzles and deflectors	Lee James Shadbolt	2021-05-11