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Reflexive circuit
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Electronic compass and other magnetic devices
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Electronic compass and other magnetic devices
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Brightness control device
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Binary alarm
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Electric blanket heating control with capacitance sensing
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Sanitary waste disposal packets
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Flashlight and signalling apparatus
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Oscillator detector
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Alien liquid detector and control
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Apparatus for detecting the presence of an immiscible foreign liquid on the surface of a desired liquid
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Oil detector
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Oscillator means for driving a resonant load
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Alerting device having oscillations of negative resistance circuit controlled by mechanical resonance of transducer
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Electrically operated audible alarm
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