Charles Fortescue Ingersoll (1791–1832), Massachusetts-born Canadian businessman and political figure who served in War of 1812 and represented Oxford County in Legislative Assembly of Lower Canada from 1824 until his death from cholera
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Charles Henry Ingersoll (1865–1948), American entrepreneur and business executive who, with his older brother, Robert (1860–1929), co-founded, in 1892, Ingersoll Watch Company, which produced forty million "dollar watches"
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Charles Jared Ingersoll (1782–1862), American lawyer and legislator; represented, as Democratic-Republican, Pennsylvania's first congressional district in 1813–15 and, as Democrat, 3rd district in 1841–43 and 4th district in 1843–49
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Charles A. Ingersoll (1798–1860), American jurist who served as U.S. District and U.S. Circuit Court clerk during 1820-53 and as probate judge in New Haven during 1829–53; Justice on U.S. District Court for Connecticut from 1853 until his death
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Charles Roberts Ingersoll (1821–1903), American state legislator and executive; son and law partner of Ralph Isaacs Ingersoll; Democrat from Connecticut; served in state legislature and, from May 1873 to January 1877, as governor of Connecticut
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