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US1124380A
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Muffle-furnace for enameling.
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DE263518C
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Firing process and kiln, especially for enamelling
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GB191019129A
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Improvements in Regulating Devices for Gas Furnaces.
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US921329A
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Process of making sodium sulfate and sulfuric acid.
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US936844A
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Plant for heating the gas and air for combustion in gas-furnaces.
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GB190628746A
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Improvements in Processes of Enamelling and Annealing.
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GB190627048A
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Improvements in Processes of Enamelling and Annealing, and in the Ovens Employed therefor.
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