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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS5790409
Kind Code:
U
More Like This:
Application Number:
JP16742880U
Publication Date:
June 03, 1982
Filing Date:
November 25, 1980
Export Citation:
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International Classes:
G03B23/00; G02B21/18; G02B21/36; (IPC1-7): G02B21/18; G02B21/36; G03B23/00
Domestic Patent References:
JPS4817305U1973-02-27