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1978219
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Information
Patent Grant
1978219
References
Source
Patent Number
1,978,219
Date Filed
Not available
Date Issued
Tuesday, October 23, 1934
90 years ago
CPC
C21D8/0252 - with application of tension
C21D1/04 - with simultaneous application of supersonic waves, magnetic or electric fields
C21D1/40 - Direct resistance heating
C21D9/46 - for sheet metals
US Classifications
148 - Metal treatment
266 - Metallurgical apparatus
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