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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS4886949
Kind Code:
U
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Application Number:
JP979572U
Publication Date:
October 20, 1973
Filing Date:
January 22, 1972
Export Citation:
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International Classes:
G09B23/18; G09B23/24; (IPC1-7): G09B23/24



 
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