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United States Utility Patents
4,181,920 - 4,181,929

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NumberTitle
4,181,920 Magnetic ticket encoding transport
4,181,921 Harmonic distortion attenuator
4,181,922 Circuit interrupter with improved adjustable trip unit
4,181,923 Ceramic trimmer capacitor
4,181,924 Mating circuit breakers with bus clip receiving zone and communicating arcuate groove
4,181,925 Transparent instrument cover and instrument incorporating same
4,181,926 Illuminating fixture for surgical light
4,181,927 Candle holder
4,181,928 Portable spot/flood light
4,181,929 Portable illuminating tower



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