David J. Steffensmeier

📍 Winterset, IA: #37 of 74 inventorsTop 50%

🗺 Iowa: #8,735 of 15,303 inventorsTop 60%

Overall (All Time): #3,369,140 of 4,157,543Top 85%

Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
7445568	Volleyball training device	—	2008-11-04