AS

Allen G. Stolzfus

RS Rosetta Stone: 1 patents #14 of 21Top 70%
📍 Iowa City, IA: #464 of 834 inventorsTop 60%
🗺 Iowa: #8,735 of 15,303 inventorsTop 60%
Overall (All Time): #3,323,781 of 4,157,543Top 80%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
7524191 System and method for language instruction Jack August Marmorstein, Gregory Keim, Eugene H. Stoltzfus, Duane M. Sider 2009-04-28