Inventor · disambiguated record
Calvin C. Blackman
Also filed as: BLACKMAN CALVIN C
3 granted patents·26 citations·filing 1975–1989
66Inventor score
Files withBLACKMAN CALVIN C3
Top patents by PatentIndex Score
3 records- 0159US4038022AIn-furnace recuperatorBLACKMAN CALVIN C·Filed 1975·Granted Jul 26, 1977·19 cites·10 claims
- 0230US4867675AMethod and apparatus for quickly purging atmosphere gas from bell furnaceBLACKMAN CALVIN C·Filed 1988·Granted Sep 19, 1989·6 cites·4 claims
- 0324US4964798AMethod and apparatus for quickly purging atmosphere gas from bell furnaceBLACKMAN CALVIN C·Filed 1989·Granted Oct 23, 1990·1 cites·3 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →