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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS5677829
Kind Code:
U
Application Number:
JP16021779U
Publication Date:
June 24, 1981
Filing Date:
November 19, 1979
Export Citation:
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International Classes:
G03B1/60; G03B21/00; G03B23/00; (IPC1-7): G03B21/00; G03B1/60