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Jeffrey Manufacturing Co

Jeffrey Ma
Active Patents
0
Total Holdings
2

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US2250722A Liquid depth sampling device and method of obtaining samples Expired / Lapsed 1939-01-12 1941-07-29 0 Details
US2168663A Plug type switch Expired / Lapsed 1936-04-03 1939-08-08 0 Details