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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS52151731
Kind Code:
U
Application Number:
JP6019276U
Publication Date:
November 17, 1977
Filing Date:
May 14, 1976
Export Citation:
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International Classes:
G03B19/18; G03B7/01; G03B17/00; G03B21/36; (IPC1-7): G03B21/36