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Title:
Trench shoring apparatus
United States Patent 2908140
Inventors:
Everson Jr., Kirke B.
Publication Date:
10/13/1959
Assignee:
Everson Jr., Kirke B.
Primary Class:
International Classes:
E02D17/08
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US Patent References:
2425169Means for shield tunnelling
2145152Grave cribber
1391624Trench-wall-supporting machine
1317697N/A
1267058N/A
0551042N/A