CB

Calvin C. Blackman

📍 Vermilion, OH: #26 of 68 inventorsTop 40%
🗺 Ohio: #30,338 of 73,341 inventorsTop 45%
Overall (All Time): #2,326,601 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4964798 Method and apparatus for quickly purging atmosphere gas from bell furnace — 1990-10-23
4867675 Method and apparatus for quickly purging atmosphere gas from bell furnace — 1989-09-19