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3369107 Temperature regulating circuit for an ink reservoir  
3365654 Circuits for controlling electrical power  
3363087 Contactless temperature controller  
3358152 Temperature compensated transistor and means for controlling  
3356784 Apparatus for varying an alternating current flowing in a load to control the value of a parameter such as the temperature of a furnace  
3351862 Control system having proportional band shift-limiting circuit  
3351851 Balanced magnetic amplification and process control apparatus  
3349692 Temperature-sensing arrangements for heating or cooking appliances  
3349223 Oven temperature control stabilizing network  
3346722 Oil well heating apparatus control system  
3341769 Circuit for controlling the firing angle of a semiconductor a.c. current-controllingdevice  
3337792 Firing angle control circuit for silicon controlled rectifiers  
3335319 Control circuit  
3335263 Temperature control equipment  
3333476 Temperature measuring apparatus  
3334244 Integral pulse switching system  
3333086 Temperature control apparatus and method  
3330970 Proportional control circuit with bi-directional output  
3331016 Oscillator controller with reset or rate action  
3330941 Oven temperature control  
3329887 Burst length proportioning system for controlling electric power  
3328676 Continuously variable dimmer switch  
3327096 Temperature control circuit  
3322933 Synthetic fiber processing machine  
3320407 Solid state temperature control  
3310656 Condition controlling apparatus, particularly for controlling temperatures  
3309498 Controlled temperature chamber  
3308271 Constant temperature environment for semiconductor circuit elements  
3305766 Full wave voltage control systems for heating loads  
3300622 Electrical sensing device  
3300649 Lowest signal responsive control system  
3300623 Crystal oven heating and control system  
3299345 Voltage control system for heating loads  
3299346 Half-wave voltage control system for heating loads  
3299344 Full wave voltage control system for heating load  
3299300 Oscillator oven  
3284721 Oscillator controller with on-off time proportioning  
3283127 Control circuit  
3283055 Temperature control system for high temperature melters or the like  
3283179 Apparatus for and method of zero switching  
3280306 Control apparatus  
3277460 Crowbar trip and trip indicator circuit  
3277280 Condition responsive circuit  
3275802 Pulsed heating system  
3274375 Thermostatic oven controller with automatic reset  
3270184 Temperature sensitive control wires provided with transistors for electrically heated pads, blankets and the like  
3258579 Oven control circuit  
3254838 Temperature control arrangements  
3247361 Regulator  
3247358 Dual heat level soldering iron