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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS564885
Kind Code:
B1
Application Number:
JP4642572A
Publication Date:
February 02, 1981
Filing Date:
May 12, 1972
Export Citation:
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International Classes:
G03B21/00; G03B31/02; (IPC1-7): G03B21/00; G03B31/02