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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS5255241
Kind Code:
Y2
Application Number:
JP3106473U
Publication Date:
December 14, 1977
Filing Date:
March 12, 1973
Export Citation:
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International Classes:
E04G11/48; E01D21/00; E04G11/54; (IPC1-7): E04G11/54; E01D21/00