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US2088932A
|
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Electrical steam boiler or hot water heater
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US2007586A
|
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Method for converting carbon dioxide contained in gases into carbon monoxide
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GB360734A
|
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An improved accumulating electrical water heater
|
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US1875897A
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Method for treating materials containing arsenious acid
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US1900670A
|
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Cement or materials containing cement
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GB318548A
|
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Electric furnace for continuous production of cyanogen compounds
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GB318547A
|
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Apparatus for continuous production of cyanogen compounds
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US1610897A
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Process for producing cyanic combinations
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GB272996A
|
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A process of and apparatus for manufacturing cyanides
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GB157331A
|
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Improvements in electric connecting plugs
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GB167262A
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Improvements in or relating to coating metal objects with a layer of another metal or an alloy, and soldering
|
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US1426683A
|
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Process for coating metal cbjects with a layer of another metal
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US1376735A
|
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Contact-pin for connecting-plugs and process for the manufacture thereof
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US1345645A
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Electric soldering-iron
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