73787577
Mar 20, 1989
Jun 26, 1990
PHOTOELECTRIC SWITCH; PHOTOELECTRIC CONTROL EQUIPMENT, NAMELY, POWER SUPPLY UNIT, AMPLIFIER UNIT AND TIMER UNIT; ELECTRONIC COUNTER; EXPLOSION-PROOF CONTROL EQUIPMENT, NAMELY, RELAY, SIGNAL TRANSMITTER AND SWITCH; LINE SCAN CAMERA; PROXIMITY SWITCH; FIBER OPTICS; HIGH FREQUENCY FLUORESCENT LIGHT FOR USE WITH LINE SCAN CAMERA; PHOTOSENSOR WITH BUILT-IN AMPLIFIER
Electrical and Scientific Apparatus