JD

John F. Deringer

AS Allegheny Ludlum Steel: 1 patents #29 of 55Top 55%
📍 Oakmont, PA: #107 of 162 inventorsTop 70%
🗺 Pennsylvania: #43,221 of 74,527 inventorsTop 60%
Overall (All Time): #4,018,164 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4529176 Replaceable seals for ladle heaters William Bloom, Robert J. Hall 1985-07-16