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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS5257284
Kind Code:
Y2
Application Number:
JP1902873U
Publication Date:
December 26, 1977
Filing Date:
February 12, 1973
Export Citation:
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International Classes:
F01N3/20; F01N3/00; F01N3/08; (IPC1-7): F01N3/00