Square D

US Patent 7112898 Real-time digital voltage sag compensator

US Patent 7117044 Alternative energy system control method and apparatus

US Patent 7126068 Switching mechanism with mechanical interlocking and manual override

US Patent 7130173 Direct force armature for a trip assembly

US Patent 7136265 Load recognition and series arc detection using bandpass filter signatures

US Patent 7138924 Disturbance direction detection in a power monitoring system

US Patent 7140702 Medium voltage motor control center arc resistant enclosure

US Patent 7146420 Internet listener/publisher

US Patent 7151656 Arc fault circuit interrupter system

US Patent 7176771 Circuit breaker filter assembly

US Patent 7177771 Digital dynamic filtering and beat frequency reduction for power monitoring

US Patent 7180759 Push-pull inverter with snubber energy recovery

US Patent 7183667 Method and apparatus for power inverter synchronization

US Patent 7185281 Remote metering display with motion sensor

US Patent 7193827 Single-sensor microcontroller-based approach for ground fault circuit interrupters

US Patent 7211750 Switching mechanism with shock absorber

US Patent 7232965 Linear motion compensator

US Patent 7249023 Navigated menuing for industrial human machine interface via speech recognition

US Patent 7250836 Terminal support for a circuit breaker trip unit

US Patent 7253637 Arc fault circuit interrupter system

US Patent 7268654 Circuit breaker latching mechanism

US Patent 7272518 Automated hierarchy classification in utility monitoring systems

US Patent 7274974 Independent automatic shedding branch circuit breaker

US Patent 7311538 Tap-off interlock

US Patent 7327558 Front-accessible communications port for enclosed electrical equipment

US Patent D562257 Transfer switch for alternative power sources to a load center

US Patent 7345860 Load recognition and series arc detection using load current/line voltage normalization algorithms

US Patent 7349815 Automated integration of data in utility monitoring systems

US Patent 7355132 Side-mounted lock-off accessory for a circuit breaker

US Patent 7397212 DC motor phase estimation with phase-locked loop

US Patent 7397333 Trip unit having bimetal element located outside the yoke

US Patent 7444249 Digital power metering system for reducing spectral leakage when determining the frequencies present in a power signal

US Patent 7469190 Automated system approach to analyzing harmonic distortion in an electric power system

US Patent 7495876 Circuit breaker integral temperature monitoring for advance detection of defective power conductor connections

US Patent 7498535 Circuit breaker operator

US Patent 7511474 DC motor phase detection method for determining a distance traveled by a load

US Patent 7521884 Apparatus and method for controlling a transfer switch mechanism

US Patent 7548036 DC motor mechanical shock protection system

US Patent 7570074 Electronic overload relay for mains-fed induction motors

US Patent 7598629 Control circuit for a remotely controlled circuit breaker

US Patent 7642676 Contact verification method for a transfer switch mechanism

US Patent 7688005 Lighting load management system for lighting systems having multiple power circuits

US Patent 7788055 Method and system of calibrating sensing components in a circuit breaker system

US Patent 7865320 High density metering system

US Patent 7881075 Apparatus and methods for mounting and retaining power monitoring systems

US Patent 7928722 Apparatus and method for voltage sensing in electrical metering systems

US Patent 7937247 Virtual metering