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3757557
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Patent Grant
3757557
References
Source
Patent Number
3,757,557
Date Filed
Not available
Date Issued
Tuesday, September 11, 1973
51 years ago
CPC
B21D25/00 - Working sheet metal of limited length by stretching
B21D3/12 - by stretching with or without twisting
US Classifications
072 - Metal deforming
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