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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS5271488
Kind Code:
U
Application Number:
JP15838675U
Publication Date:
May 27, 1977
Filing Date:
November 21, 1975
Export Citation:
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International Classes:
E01F13/00; E01F9/00; E01F13/04; G09F7/18; G09F9/00; (IPC1-7): E01F9/00; E01F13/00; G09F9/00