| 发明名称 |
SEPARATING SIGNAL SYSTEM FOR SUBSCRIBER*S LINE |
| 摘要 |
PURPOSE:To realize a new service even during a talking time easily by separating the transmissions for various signals and for sound signals between an exchange and telephone sets. |
| 申请公布号 |
JPS5399803(A) |
申请公布日期 |
1978.08.31 |
| 申请号 |
JP19770014816 |
申请日期 |
1977.02.12 |
| 申请人 |
NIPPON TELEGRAPH & TELEPHONE |
发明人 |
WATANABE KUNIO;NOMURA YOSHIO;KOMACHIYA TADAYOSHI |
| 分类号 |
H04M3/00;H04Q3/00;(IPC1-7):04M7/00 |
主分类号 |
H04M3/00 |
| 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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