Robert L. Harrell

📍 Phoenix, AZ: #2,590 of 6,660 inventorsTop 40%

🗺 Arizona: #13,050 of 32,909 inventorsTop 40%

Overall (All Time): #2,356,401 of 4,157,543Top 60%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
4428890	Cylindrical evaporative cooler apparatus	—	1984-01-31
D256388	Cylindrical evaporative cooler	—	1980-08-12