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EARL L KOCH HOLDING Corp

EARL L KOC
Active Patents
0
Total Holdings
3

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US1985417A Radio communication system Expired / Lapsed 1929-12-31 1934-12-25 0 Details
US1980804A Thermionic tube Expired / Lapsed 1931-03-21 1934-11-13 0 Details
US1963238A Radioreceiver Expired / Lapsed 1931-06-11 1934-06-19 0 Details