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SPENCER THERMOSTAT Co

SPENCER TH
Active Patents
0
Total Holdings
3

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US1848031A Valve Expired / Lapsed 1930-05-31 1932-03-01 0 Details
US1845998A Thermostat Expired / Lapsed 1926-02-13 1932-02-16 0 Details
US1678407A Thermostat Expired / Lapsed 1923-11-10 1928-07-24 0 Details