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Title:
Trench shoring apparatus
United States Patent 2908140
Inventors:
Everson Jr., Kirke B.
Application Number:
US51548855A
Publication Date:
10/13/1959
Filing Date:
06/14/1955
Assignee:
Everson Jr., Kirke B.
Primary Class:
International Classes:
E02D17/08
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US Patent References:
2425169Means for shield tunnelling1947-08-05
2145152Grave cribber1939-01-24
1391624Trench-wall-supporting machine1921-09-20
1317697N/A1919-10-07
1267058N/A1918-05-21
0551042N/A1895-12-10