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GB191505675A
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Improvements in Adding and Subtracting Machines.
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GB191505674A
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An Improved Adding and Subtracting Machine.
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GB191424639A
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Improvements in connection with Machines for Compiling Statistics from Perforated Cards, Sheets and the like.
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CA140530A
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Calculating machine
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GB191025018A
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Improvements in and relating to Calculating Machines.
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GB191007014A
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Improvements in and relating to Calculating Machines.
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GB190908259A
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Improvements in and relating to Calculating Machines.
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GB190803060A
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Improvements in Systems for the Projection of Rays such as Search Lights and other similar Forms of Apparatus.
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GB190021884A
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Improvements in Machinery for Grinding the Cutting Tools of Engraving Machines
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GB190020602A
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Improvements in Automatic Engraving Machines
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GB190002197A
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Improved Magnetic Holding Table for Metal Working Machines, specially Adapted to Hold Flat Artices down upon it
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US651691A
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Apparatus for displaying photographs of moving objects.
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US663153A
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Apparatus for displaying photographs.
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GB189908246A
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Improvements in Apparatus for Displaying Photographs of Moving Objects.
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GB189908245A
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Improvements in Apparatus for Taking and Displaying Photographs of Moving Objects.
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