Walter K. Kropf

UN Unknown: 1 patents #29,356 of 83,584Top 40%

📍 Harrisburg, OR: #3 of 11 inventorsTop 30%

🗺 Oregon: #10,188 of 28,073 inventorsTop 40%

Overall (All Time): #1,638,262 of 4,157,543Top 40%

Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
5735459	Method for forming and applying biological control system	—	1998-04-07
5135063	Power unit for driving manually-operated wheelchair	—	1992-08-04
4597219	Vacuum/gravity feed contact herbicide applicator	—	1986-07-01