73117838
Mar 3, 1977
Jan 20, 1981
Plug-In Electronic Digital and Analog Modules for Interconnecting a Microcomputer to Auxiliary Sensor and Control Devices-Namely, Retro-Reflective Scanners, Modulated Light Sources, Photo-Receivers, Reflective Discs, Temperature and Pressure Transducers, Switch Contacts, Motor Starters, Damper Motors, and Proximity Sensors
Electrical and Scientific Apparatus