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by Richard D. Breen administrator
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Kennett Square, PA, US
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Patent Grant
Crimped thermoplastic synthetic filaments of asymmetric composition
Patent number
3,953,962
Issue date
May 4, 1976
E. I. Du Pont de Nemours and Company
Alvin L. Breen
D02 - YARNS MECHANICAL FINISHING OF YARNS OR ROPES WARPING OR BEAMING