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Patent Searching and Data


Document Type and Number:
Japanese Patent JPH03128720
Kind Code:
U
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Application Number:
JP3810490U
Publication Date:
December 25, 1991
Filing Date:
April 11, 1990
Export Citation:
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International Classes:
E02B7/20; E02B15/06; (IPC1-7): E02B15/06; E02B7/20