US1284021A
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Electromagnetically-operated valve.
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US853144A
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Variable-speed-transmission device.
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GB190403885A
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Improvements in Electrical Switching Systems.
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GB190402457A
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Improvements in Electric Switches.
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CA69068A
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Electric circuit breaker
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GB190013805A
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Improvements in Insulating Supports for Electrical Conductors.
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CA69069A
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Electric circuit breaker
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GB189921082A
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Improvements in Electric Circuit Breakers.
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GB189915139A
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Improvements in Automatic Electric Circuit Breakers.
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GB189914997A
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Improvements in Switches for Electric Circuits.
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GB189808140A
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Improvements in Switches for Electric Circuits.
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