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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS5050039
Kind Code:
A
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Application Number:
JP9818773A
Publication Date:
May 06, 1975
Filing Date:
September 03, 1973
Export Citation:
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International Classes:
G03B3/02; G02B7/10; G02B7/28; G03B13/32; (IPC1-7): G02B7/11
Domestic Patent References:
JPS4121314Y11966-10-19