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DuPont Rayon Co

DuPont Ray
Active Patents
0
Total Holdings
2

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US2045722A Manufacture of thread Expired / Lapsed 1933-04-19 1936-06-30 0 Details
US1975153A Method of producing multicolored threads Expired / Lapsed 1932-02-03 1934-10-02 0 Details