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The Echlin Manufacturing Co

The Echlin
Active Patents
0
Total Holdings
2

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US2221591A Frequency measuring apparatus Expired / Lapsed 1939-05-01 1940-11-12 0 Details
US2161146A Apparatus for measuring frequency Expired / Lapsed 1936-08-15 1939-06-06 0 Details