Apparatus for installing cardboard wick drain
United States Patent 3300987
US Patent References:
Drainage system
- - 2482673

Drainage method and device
- - 2577252


Inventors:
Keiji, Maeda
Publication Date:
01/31/1967
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Assignee:
KATO SEISAKUSHO KK
Primary Class:
405/50
International Classes:
E02B11/00; E02D3/10; E02D3/00