Wilmington, Delaware Harrisburg Car Manufacturing Company (1853 – c. 1890) Harrisburg, Pennsylvania Harvey Steel Car and Repair Works (c. 1892) Harvey, Illinois Haskell and Barker Car Company (1852–1971) Michigan City, Indiana Hazelton Car Works (1880s) Hazelton, Pennsylvania Hicks Locomotive and Car Works (1897–1911) Chicago, Illinois Huntingdon Car Works (1872 – c. 1885) Huntingdon, Pennsylvania Illinois Car and Manufacturing Company (1897–1902) Chicago & Urbana, Illinois/Anniston, Alabama (to Western Steel Car 1902) Illinois Car & Manufacturing Company (c. 1909–) Hammond, Indiana Indiana Car Company (1872–1884) Cambridge City, Indiana Indianapolis Car Company (c. 1870 – c. 1900) Indianapolis, Indiana Indianapolis Car and Foundry Ingalls Shipbuilding, Pascagoula, Mississippi (built covered hoppers for NACC) International Car Company (ICC) (1952–) Buffalo, New York/Kenton, Ohio/East Chicago, Indiana (to PC&F) Richard Imlay (1830 – c. 1840) Baltimore, Ohio/Philadelphia, Pennsylvania Itel Jackson and Sharp Company (Delaware Car Works) (1863 – c. 1945) Wilmington, Delaware Jackson and Woodin Manufacturing Company (1861–) Berwick, Pennsylvania J.J. Finnigan, Duluth, Georgia Jones Car Works (1879 – c. 1912) West Troy, New York Kansas City Car & Wheel Company (c. 1880 – c. 1900) Kansas City & Armourdale, Missouri Kasgro William M. Kasson & Son (c. 1860 – c. 1870) Buffalo, New York H.T. & I.N. Keith (later Keith Car) (c. 1865 – c. 1935) West Sandwich, Sagamore & Hyannis, Massachusetts Kimball & Gorton (1849–1862) Philadelphia, Pennsylvania Kimball Manufacturing Company (1860 – c. 1876) San Francisco, California Koppel Car Company, Chicago, Illinois (to Pressed Steel Car) Laconia Car Company (1879–1928) Laconia, New Hampshire LaFayette Car Works (1880–) LaFayette, Indiana Laporte Car Manufacturing Company (1872 – c. 1878) Laporte, Indiana Lebanon Manufacturing Company (1870–) Lebanon, Pennsylvania Lehigh Valley Car Manufacturing Company (c. 1870–) Stemton, Pennsylvania Lenoir Car Company (1894–1930) Lenoir City, Tennessee Liberty Car and Equipment Lima Car Company (1880s) Lima, Ohio Litchfield Car Manufacturing Company (1872–) Litchfield, Illinois Locks & Canals (c. 1840 – c. 1850) Lowell, Massachusetts Madison Car Company (1891–) Madison, Illinois Magor Car Corporation (1902–1973) Passaic, New Jersey (to Fruehauf) Mansfield Machine Works (c. 1870–) Mansfield, Ohio Marathon Tank Car, Houston, Texas (to Richmond Tank Car) Marshall Car and Foundry Company (1880–) Marshall, Texas Mather Stock Car Company Maxson Corporation (formerly St. Paul Foundry & Manufacturing) (1966–) St. Paul, Minnesota McGuire, Cummings Manufacturing Company (c. 1890 – c. 1930) Chicago, Illinois McKee, Fuller & Company (1879–) Catasauqua, Pennsylvania McNary, Claflin & Company (1864–1878) Cleveland, Ohio Mechtron Industries (1974–1981) Wilmington, Delaware (built covered