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发明名称
OPTICAL DIRECTIONAL COUPLER
摘要
申请公布号
JPH04328703(A)
申请公布日期
1992.11.17
申请号
JP19910099030
申请日期
1991.04.30
申请人
NEC CORP
发明人
MIYAGAWA TOSHIYA
分类号
G02B6/28
主分类号
G02B6/28
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代理人
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