Title:
Tunneling machine having suction exhaust means
United States Patent 3005627
Inventors:
William, Tinlin
Publication Date:
10/24/1961
Export Citation:
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Assignee:
William, Tinlin
Primary Class:
299/56
Other Classes:
175/94, 175/102, 299/18, 299/62
International Classes:
E21D9/10; E21D9/13; E21D9/10; E21D9/12
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US Patent References:
2606010Mechanized production of solid fuel
1140673N/A
0900950N/A
Foreign References:
DE642865C