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2349828
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Information
Patent Grant
2349828
References
Source
Patent Number
2,349,828
Date Filed
Not available
Date Issued
Tuesday, May 30, 1944
81 years ago
CPC
F16F1/046 - with partial nesting of inner and outer coils
B21D11/06 - Bending into helical or spiral form Forming a succession of return bends
B21F3/06 - internally on a hollow form
US Classifications
072 - Metal deforming
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