75072620
Mar 14, 1996
Dec 1, 1998
electrical and electronic devices for use in the process of aluminum electrolysis, namely, multi-function measuring modules for measuring, controlling and monitoring voltage, current and temperature; open and closed loop control and switching devices; central processing units for down loading mathematical calculations; integrated software for use in the operation of the foregoing and for processing, storing and transferring data in connection with the foregoing
Electrical and Scientific Apparatus