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GB191307890A
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Improvements in or relating to Conveyors.
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GB191008648A
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Improvements in and relating to Water Supply Devices for Hammer Rock-drills,
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GB190906667A
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Improvements in and relating to Water Feed Devices for Rock Drills and the like.
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GB190906668A
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Improvements in and relating to Water Feed Devices for Rock Drills and the like.
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GB190823518A
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Improvements in Packing for Rock Drills
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GB190823519A
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Improvements in Rock Drills and other Pneumatically Operated, Tools
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GB190820608A
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Improvements in Rock-drilling Machines.
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GB190617828A
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Improvements in Pneumatic Percussive Rock Drills
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GB190429019A
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Improved Valve Apparatus for Percussive Rock Drills and the like.
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US806128A
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Rock-boring machine.
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GB190318541A
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Improvements in the Valve Gear of Rock Boring and other Machines Driven by Compressed Air, Compressed Gases, Steam and like Mediums.
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