JE

J. Calvin Elder

AS American Standard: 1 patents #290 of 558Top 55%
📍 Penn Hills, PA: #51 of 88 inventorsTop 60%
🗺 Pennsylvania: #43,221 of 74,527 inventorsTop 60%
Overall (All Time): #4,067,657 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4323210 Manual block traffic control and signaling system for railroads — 1982-04-06