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National Research Corp

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Active Patents
0
Total Holdings
2

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US3009098A Electrical apparatus for analyzing gases Expired / Lapsed 1958-08-15 1961-11-14 0 Details
US2824488A Apparatus for grading fibers Expired / Lapsed 1954-08-25 1958-02-25 0 Details