73757115
Oct 6, 1988
May 21, 1991
MACHINE PARTS, NAMELY MOLDS FOR FORMING ROLLERS, HEATING RODS AND ELEMENTS OF SINTERED SILICON CARBIDE
MachineryROLLER-HEARTH FURNACE COMPONENTS, NAMELY ROLLERS, HEATING RODS AND HEATING ELEMENTS FOR ELECTRIC FURNACES
Environmental Control Apparatus