JJ

John T. Armstrong, Jr.

Caterpillar: 2 patents #2,982 of 8,398Top 40%
AG Abb Vetco Gray: 1 patents #67 of 165Top 45%
📍 Chillicothe, IL: #89 of 214 inventorsTop 45%
🗺 Illinois: #26,653 of 84,256 inventorsTop 35%
Overall (All Time): #1,618,322 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
6454015 Shearing gate valve Ian Gourlay, Peter M. Kent, Chau Hoang 2002-09-24
4523892 Hydrostatic vehicle control Randall M. Mitchell 1985-06-18
4331917 Speed and direction sensing circuit Michael L. Render 1982-05-25