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FR SADIR CARPENTIER SOC

FR SADIR C
Active Patents
0
Total Holdings
2

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US2533599A Radio receiving system Expired / Lapsed 1948-02-18 1950-12-12 0 Details
US2509829A Duplex telegraph system Expired / Lapsed 1947-08-11 1950-05-30 0 Details