William J. Ratajczek

📍 Trempealeau, WI: #6 of 15 inventorsTop 40%

🗺 Wisconsin: #17,084 of 40,088 inventorsTop 45%

Overall (All Time): #2,281,949 of 4,157,543Top 55%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
5561917	Sludge drier	—	1996-10-08
5386764	Grain roaster/cooler with preheater	—	1995-02-07