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John F. Shell

UN Unknown: 1 patents #29,356 of 83,584Top 40%
📍 Landover, MD: #8 of 20 inventorsTop 40%
🗺 Maryland: #19,431 of 35,612 inventorsTop 55%
Overall (All Time): #4,044,076 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4482328 Audio-visual teaching machine and control system therefor Frank W. Ferguson, Steven D. Hale 1984-11-13