JL

John D. Langdon

EI Erico International: 1 patents #85 of 144Top 60%
📍 Avon Lake, OH: #124 of 284 inventorsTop 45%
🗺 Ohio: #30,338 of 73,341 inventorsTop 45%
Overall (All Time): #2,328,795 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4807888 Device for the automatic operation of international metallic silhouette target platforms Victor S. Pidde 1989-02-28
4757967 Box support Martin F. Delmore 1988-07-19