GB351998A
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Improved process of and device for maintaining blasting explosive charges in bore-holes
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GB186763A
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Improved process for preventing or extinguishing explosions in mines
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US1504824A
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Method of and means for extinguishing or smothering explosions in mines
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US1459677A
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Method of and means for extinguishing or smothering explosions in mines
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GB175749A
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Improved method of and means for extinguishing or smothering explosions in mines
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US1476624A
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Method of and means for extinguishing or suffocating explosions in mines
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GB161474A
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Improved method of and means for extinguishing or smothering explosions in mines
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