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1520063
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Patent Grant
1520063
References
Source
Patent Number
1,520,063
Date Filed
Not available
Date Issued
Tuesday, December 23, 1924
100 years ago
CPC
C23C8/58 - more than one element being applied in more than one step
C23C8/46 - of ferrous surfaces
C23C8/52 - more than one element being applied in one step
US Classifications
148 - Metal treatment
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