JL

John B. Littlefield

AI Amsted Industries Incorporated: 2 patents #58 of 219Top 30%
📍 Wheaton, IL: #395 of 884 inventorsTop 45%
🗺 Illinois: #34,584 of 84,256 inventorsTop 45%
Overall (All Time): #2,365,305 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4313869 Composition friction element for a railroad brake shoe 1982-02-02
4219452 Composite friction element 1980-08-26