Robert D. Walker

📍 Ham Lake, MN: #9 of 35 inventorsTop 30%

🗺 Minnesota: #1,999 of 5,843 inventorsTop 35%

Overall (2011): #177,839 of 364,097Top 50%

Patents 2011

Issued Patents 2011

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
8075031	HVAC filter changing system	—	2011-12-13