Four level frequency shift keying optical communication apparatus,申请号US19880263221-传众专利搜索

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发明名称	Four level frequency shift keying optical communication apparatus
摘要
申请公布号	US4984297(A)	申请公布日期	1991.01.08
申请号	US19880263221	申请日期	1988.10.27
申请人	NEC CORPORATION	发明人	MANOME, KAORU
分类号	H04B10/04;H04B10/06;H04B10/142;H04B10/148;H04B10/152;H04L27/14	主分类号	H04B10/04
代理机构		代理人
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