73189970
Oct 19, 1978
Aug 7, 1990
Active Trademark
SOLID STATE FREQUENCY CONVERTOR FOR INDUCTION MELTING AND HEATING FURNACES, AND FREQUENCY TRIPLER USED WITH INDUCTION MELTING [ AND ] FURNACES, AND ELECTRIC POWER SUPPLIES AND REGULATORS FOR INDUCTION MELTING AND HEATING FURNACES
Electrical and Scientific Apparatus