WL

Walter E. Langbein

UN Unknown: 1 patents #29,356 of 83,584Top 40%
📍 Downers Grove, IL: #480 of 824 inventorsTop 60%
🗺 Illinois: #48,934 of 84,256 inventorsTop 60%
Overall (All Time): #3,898,953 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4911425 Wheelchair user exercise device Lutz T. Kynast 1990-03-27