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Improvements in electrical water heating apparatus
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Improvements in electrical water heaters
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Improvements in electrical water heaters
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Improvements in electric water heaters
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Improvements in electric water heaters
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Improvements in electric water heaters
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Improvements in electric water heaters
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Water heating apparatus
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Electric water heater
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Electric water heater
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Electric heating apparatus
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Improvements in electric switches for electric heating apparatus
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Improvements in electric thermostats
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Improvements in water heating apparatus
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Improvements in electric water heating
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Improvements in automatically operated electrical apparatus
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Electric range and water heater
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Core for electric water heaters
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Improvements in water heaters
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Improvements in water heaters
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Improvements in electric heating apparatus for liquids
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Improvements in electrical heating apparatus
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Electrical heating device
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Electric water heating apparatus