[4] Griffiths Clyde/ Foundry ladle transfer car/ US2889597/ Whiting Corp/ Jun 9, 1959. [5] Britcher Harry, Gallucci Francis/ Car having ladle supporting and positioning means/ US3459312/ United States Steel Corp/ Aug 5, 1969. [6] Morhart Karl, Spannlang Ronald/ Converter-carrying transfer and positioning vehicle/ US3593859/ Voest Ag/