74019557
Jan 16, 1990
Jul 21, 1992
electronic data processing apparatus; namely, computer-based man-machine interfaces for use in industrial process control systems; and computer installations and components therefor; namely, visual display terminals; programmable logic controllers, data transmission and storage modules, communications modules, and rack mount units for receiving plug-in electronic modules; and computer software for use with any of the aforementioned goods
Electrical and Scientific Apparatus