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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS5622170
Kind Code:
Y2
Application Number:
JP11648376U
Publication Date:
May 25, 1981
Filing Date:
August 31, 1976
Export Citation:
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International Classes:
G02B7/06; G02B7/04; G03B23/06; (IPC1-7): G02B7/06; G03B23/06