9
COUNTER-TIMERS, PLUG-IN FREQUENCY EXTENDERS FOR COUNTER-TIMERS, FREQUENCY METERS, PLUG-IN FREQUENCY EXTENDERS FOR FREQUENCY METERS, PLUG-IN FREQUENCY CONVERTERS, TIME INTERVAL MEASUREMENT PLUGINS, TIME INTERVAL AND DUAL MEASUREMENT PLUG-INS, PRESET PLUG-INS, VIDEO AMPLIFIER PLUG-INS, PRE-SCALER PLUG-INS, FREQUENCY COUNTERS, FREQUENCY TO D.C. CONVERTERS, DIGIT-SET UNIVERSAL COUNTERS, DIGITAL RECORDERS, REMOTE IN-LINE INDICATORS, D.C. TO TIME CONVERTERS, HIGH SPEED DIGITAL VOLT METERS, TIME INTERVAL METERS, DIGITAL LIMIT DETECTORS, DIGITAL VOLT METERS, DIGITAL CLOCKS, ELECTRONIC COUNTERS, AUTOMATIC CHECKOUT EQUIPMENT, SINGLE AND MULTI-CHANNEL DATA PROCESSORS, VOLTAGE TO TIME CONVERTERS, ELECTRONIC DATA ACQUISITION SYSTEMS, ANALOG COMPUTERS, SUMMERS, INTEGRATORS, MULTIPLIERS, INVERTERS FOR ANALOG COMPUTERS, VARIABLE DIODE FUNCTION GENERATORS, COMPARATORS, DIGITAL LOGIC CONTROL MODULES, OPERATIONAL AMPLIFIERS, SUMMERS/INVERTERS, FUNCTION RELAYS, ELECTRONIC SWITCHES, FUNCTION SWITCHES, COEFFICIENT POTENTIOMETERS, FLIP FLOPS, GATES, POWER SUPPLIES FOR ANALOG COMPUTERS, ANALOG COMPULTER PROBLEM BOARDS, LINEAR AND ANGULAR SERVO ACCELEROMETERS, SERVO ACCELEROMETER POWER SUPPLIES, ELECTRONIC FILTERS FOR ACCELEROMETERS, INERTIAL STABILIZING SYSTEMS, ACCELERATION SWITCHES, VELOCITY SENSORS, VELOCITY PRESET ELECTRONICS MODULES, GYROS, TIME CODE GENERATORS AND TAPE SEARCH SYSTEMS