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经营范围
发明名称
DIGITAL AUDIBLE TONE GENERATOR
摘要
申请公布号
JPH01220955(A)
申请公布日期
1989.09.04
申请号
JP19880044480
申请日期
1988.02.29
申请人
NEC CORP
发明人
SAGAWA SHUICHI
分类号
G06F1/02;G06F9/46;H04M19/02;H04Q3/545;H04Q5/24;H04Q11/04
主分类号
G06F1/02
代理机构
代理人
主权项
地址
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