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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS6344820
Kind Code:
Y2
Application Number:
JP4781382U
Publication Date:
November 21, 1988
Filing Date:
April 02, 1982
Export Citation:
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International Classes:
G03B25/00; G02B27/02; G03B23/10; (IPC1-7): G03B23/10; G02B27/02