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Patent Searching and Data


Document Type and Number:
Japanese Patent JPH03129954
Kind Code:
U
Application Number:
JP3865890U
Publication Date:
December 26, 1991
Filing Date:
April 11, 1990
Export Citation:
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International Classes:
G03B42/04; G03C3/00; G03C5/17; (IPC1-7): G03B42/04; G03C3/00; G03C5/17