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GB478236A
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Improvements in or relating to sub-aqueous rock-cutting apparatus
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GB484879A
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Improvements in or relating to apparatus particularly for rock cutting
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GB342213A
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Improvements in dredgers for dredging valuable alluvial earths
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GB318807A
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Improvements in dipper dredges or excavators
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US1613374A
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Means for anchoring dredges
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GB235485A
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Improved means for anchoring dredges
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GB233271A
|
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Improvements relating to suction dredges of the rotary cutter type
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US1553062A
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Slewing gear for drag-line excavators, grab excavators, revolving shovels, and the like
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US1553063A
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Directly-driven slewing gear for drag-line excavators
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GB228433A
|
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An indicating device for sub-aqueous rock-cutters
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US1539631A
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Truck for excavators of the drag-line type
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US1564928A
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Roller bearing for turntables
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US1541464A
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Drag-line excavator
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US1538922A
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Guide or fair-lead for the drag rope of a drag-line excavator
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GB222034A
|
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Improvements in drag-line excavators
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GB221732A
|
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Improvements relating to trucks for excavators of the "drag-line" type
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US1432828A
|
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Subaqueous rock-cutting apparatus
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GB177581A
|
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Improvements in sub-aqueous rock cutting apparatus
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GB173576A
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Improvements relating to mechanism for raising and lowering the discharge doors of hopper barges and dredgers
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