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发明名称
WRITING GRATINGS
摘要
申请公布号
CA2227493(A1)
申请公布日期
1998.07.24
申请号
CA19982227493
申请日期
1998.01.20
申请人
NORTHERN TELECOM LIMITED
发明人
NAPIER, BRUCE;PHILLIPS, NICHOLAS JOHN
分类号
G02B6/13;G02B5/18;G02B6/02;G03F7/20;(IPC1-7):G02B5/18;G02B27/44
主分类号
G02B6/13
代理机构
代理人
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地址
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