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US755956A
|
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Method of constructing tunnels, shafts, or other excavations.
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US755955A
|
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Method of constructing foundations, tunnels, &c.
|
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US736560A
|
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Method of constructing foundations and tunnels or other structures.
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US736308A
|
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Method of freezing the ground.
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US711013A
|
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Method of driving piles.
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US713165A
|
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Method of solidifying and excavating the soil and constructing tunnels.
|
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US720384A
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Method of solidifying and excavating the soil and constructing tunnels.
|
|
US713521A
|
|
Tunnel.
|
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US713520A
|
|
Method of constructing tunnels.
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US711012A
|
|
Method of excavating and constructing tunnels or other subterranean or submarine structures.
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|
US713164A
|
|
Method of placing piles.
|
|
US713519A
|
|
Method of building tunnels, shafts, &c.
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