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Patent Searching and Data


Document Type and Number:
Japanese Patent JPH0278609
Kind Code:
U
Application Number:
JP15489988U
Publication Date:
June 18, 1990
Filing Date:
November 30, 1988
Export Citation:
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International Classes:
E01C3/00; E01C7/04; E01C11/16; (IPC1-7): E01C3/00; E01C7/04; E01C11/16
Domestic Patent References:
JPS62148713A1987-07-02
JP51054431B