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GB543664A
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Improvements relating to illumination
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GB528337A
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Improvements in the carbonisation of carbonaceous materials
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GB528338A
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Improvements in the gasification of carbonaceous materials
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GB522640A
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Improvements in the manufacture of combustible gas and coke from carbonaceous materials
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GB519246A
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Improvements in the carbonisation of carbonaceous materials
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GB514302A
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Improvements in the production of hydrocarbon gases by hydrogenation of carbonaceousmaterials
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GB513006A
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Improvements relating to the treatment of coal with gases while heating
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GB503158A
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Manufacture of combustible gases
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GB503183A
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Improvements in the production of hydrocarbon gases by hydrogenation of carbonaceous materials
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GB491453A
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Improvements in the production of hydrocarbon gases by hydrogenation of carbonaceous materials
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GB455648A
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Improvements relating to the recovery of ammonia from coal- and like gases
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GB393678A
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Improvements relating to the recovery of ammonia from coal-gas and like gases
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