| 发明名称 |
INFORMATION SERVICE SYSTEM |
| 摘要 |
<p>PURPOSE:To confirm a proper user by telephoning the requester from the center side after disconnecting the line once when the center unit receives the request of information service.</p> |
| 申请公布号 |
JPS5379342(A) |
申请公布日期 |
1978.07.13 |
| 申请号 |
JP19760154842 |
申请日期 |
1976.12.24 |
| 申请人 |
HITACHI LTD |
发明人 |
ICHIKAWA AKIRA |
| 分类号 |
H04M11/06;H04L9/00;H04L9/32;H04M3/42;H04M11/00 |
主分类号 |
H04M11/06 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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