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ANN K BARRETT

ANN K BARR
Active Patents
0
Total Holdings
3

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US2553292A Dynamoelectric machine Expired / Lapsed 1948-11-20 1951-05-15 0 Details
US2551198A Record mechanism Expired / Lapsed 1947-03-22 1951-05-01 0 Details
US2428002A Wire type recording and reproducing apparatus Expired / Lapsed 1945-03-09 1947-09-30 0 Details