Title:
【考案の名称】水路用段差ブロツク
Document Type and Number:
Japanese Patent JPS59135924
Kind Code:
U
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Inventors:
Mikio Hirai
Application Number:
JP2637883U
Publication Date:
September 11, 1984
Filing Date:
February 23, 1983
Export Citation:
International Classes:
E02B5/00; E02B7/00; E02B13/00; (IPC1-7): E02B13/00; E02B7/00
Domestic Patent References:
| JP53079732B |