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GB496566A
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Improvements in or relating to gas detectors
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GB433570A
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Improvements in and relating to electric gas-detecting lamps
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GB399978A
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An improved electric gas-detecting lamp
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GB394355A
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Improvements in or relating to electrical apparatus for measuring, indicating, protective or other purposes
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GB368006A
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An improved method and apparatus for the measurement of the thickness of tubes or plates of iron or other magnetisable material
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GB298767A
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Improvements in or relating to apparatus for detecting the presence of inflammable gas
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GB243526A
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Improvements in or relating to miners' and like lamps
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GB220402A
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Improvements in or relating to the electric lighting of mines and the like
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GB197420A
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Improvements in or relating to lightning or surge arresters for electric conductors
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GB183330A
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Improvements in or relating to transmitting apparatus for signalling through water
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