Ralph W. Hoekstra

SS Swenson Spreader: 2 patents #3 of 10Top 30%

📍 Stillman Valley, IL: #12 of 26 inventorsTop 50%

🗺 Illinois: #34,584 of 84,256 inventorsTop 45%

Overall (All Time): #2,367,382 of 4,157,543Top 60%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
4353177	Control for snowplow blade	—	1982-10-12
4342163	Apparatus for mounting a snowplow blade to a vehicle	—	1982-08-03