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GB191406380A
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Improvements in Apparatus for Calculating Photographic Exposures.
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GB191302564A
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Improvements in or connected with Machines for Concentrating and Separating Ores and other Substances.
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CA106692A
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Ore concentrator
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GB190501697A
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Improvements in Machines for the Concentration of Ores or other Substances of Different Specific Gravities
|
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GB190313855A
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Improvements in Metronomes
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GB190311152A
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Improvements in Apparatus for Testing the Speeds of Photographic Shutters
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GB190101623A
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Improvements in Bearings for Shafting JOurnals & the like
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GB189810742A
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Improvements in Machinery or Apparatus for Washing and Dressing Ores and other Substances of Different Specific Gravities.
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GB189714865A
|
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Improvements in Actinometers.
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GB189504543A
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Improvements in Machinery or Apparatus for Breaking or Crushing Rock or other Hard Substances.
|
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GB189504388A
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Improvements in the Construction of Rock Drilling or Boring Machines or Apparatus.
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