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3446494
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Patent Grant
3446494
References
Source
Patent Number
3,446,494
Date Filed
Not available
Date Issued
Tuesday, May 27, 1969
55 years ago
CPC
F27B3/22 - Arrangements of air or gas supply devices
C21C5/04 - Manufacture of hearth-furnace steel
F27D1/1678 - Increasing the durability of linings; Means for protecting
US Classifications
432 - Heating
266 - Metallurgical apparatus
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