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2781754
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Patent Grant
2781754
References
Source
Patent Number
2,781,754
Date Filed
Not available
Date Issued
Tuesday, February 19, 1957
67 years ago
CPC
B28D1/221 - by thermic methods
E01C23/081 - by thermal or cryogenic treatment, excluding heating to facilitate mechanical working
US Classifications
125 - Stone working
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