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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS52140507
Kind Code:
U
Application Number:
JP4872176U
Publication Date:
October 25, 1977
Filing Date:
April 20, 1976
Export Citation:
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International Classes:
E01B7/00; (IPC1-7): E01B7/00
Domestic Patent References:
JP48083503B