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发明名称
Method and apparatus for altering the access format of telephone calls
摘要
申请公布号
US4908852(A)
申请公布日期
1990.03.13
申请号
US19890300796
申请日期
1989.01.23
申请人
INTELLICALL, INC.
发明人
HIRD, JOHN A.;OWEN, LINDSEY D.;RICE, MICHAEL R.
分类号
H04M15/00;H04M1/27;H04M3/487;H04M3/533;H04M15/30
主分类号
H04M15/00
代理机构
代理人
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地址
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