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GB191505849A
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Improvements in and relating to Excavating Machinery.
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US1125013A
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Lining for tunnels and for shafts.
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CA143377A
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Excavator
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US1234147A
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Excavating-machine.
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US1236691A
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Excavating-machine.
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CA181230A
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Excavator
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GB191111622A
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An Improved Excavating Machine.
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CA130359A
|
|
Excavating machinery
|
|
GB190919340A
|
|
Improvements in Excavating Machinery.
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|
US1098146A
|
|
Excavating machinery.
|
|
CA106737A
|
|
Excavator
|
|
GB190407392A
|
|
Improved Method and Machinery for Excavating and Conveying Earth and other Materials.
|
|
CA104199A
|
|
Earth excavator and carrier
|
|
US915750A
|
|
Excavating-scoop.
|
|
GB190401893A
|
|
Improved Method and Machinery for Excavating Dredging and Transporting Earth and other Materials.
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|
CA101711A
|
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Excavator
|
|
US825200A
|
|
Excavating apparatus.
|
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CA62818A
|
|
Wall or lining for shield tunnelling and for shaft sinking
|
|
CA57674A
|
|
Lining for shield tunnelling
|
|
GB189618416A
|
|
Improved Wall or Lining for Shield Tunnelling, and for Shaft Sinking.
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