Edward P. Gratzfeld

📍 Yankton, SD: #54 of 93 inventorsTop 60%

🗺 South Dakota: #1,077 of 2,308 inventorsTop 50%

Overall (All Time): #4,059,758 of 4,157,543Top 100%

Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4411554	Material spreader and bridge	—	1983-10-25