CH

Calvin B. Holden

PI Ppg Industries: 2 patents #457 of 1,216Top 40%
📍 Doylestown, OH: #27 of 72 inventorsTop 40%
🗺 Ohio: #30,338 of 73,341 inventorsTop 45%
Overall (All Time): #2,372,469 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4181583 Method for heating electrolytic cell Roger A. Steiger 1980-01-01
4181584 Method for heating electrolytic cell Roger A. Steiger 1980-01-01