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CHARLES ENGELHARD Inc

CHARLES EN
Active Patents
0
Total Holdings
2

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US2087598A Device for testing internal combustion engines Expired / Lapsed 1935-12-26 1937-07-20 0 Details
US1907540A Temperature indicating device Expired / Lapsed 1931-07-20 1933-05-09 0 Details