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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS517890
Kind Code:
Y1
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Application Number:
JP13526370U
Publication Date:
March 02, 1976
Filing Date:
December 31, 1970
Export Citation:
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International Classes:
G03B23/00; G03B23/04; G03B31/00; G03B31/04; G03B31/06; (IPC1-7): G03B31/04; G03B23/04; G03B31/00