| 发明名称 |
RECORDING SYSTEM FROM REMOTE AREA |
| 摘要 |
PURPOSE:To secure a quick and accurate recording of the information from a remote area by providing the amplifier and attenuator between the remote area and the recorder at the telephone exchange. |
| 申请公布号 |
JPS52150907(A) |
申请公布日期 |
1977.12.15 |
| 申请号 |
JP19760067717 |
申请日期 |
1976.06.11 |
| 申请人 |
HITACHI LTD |
发明人 |
NAKAYAMADA MASAYOSHI |
| 分类号 |
H04M3/50;H04M3/42;(IPC1-7):04M3/42 |
主分类号 |
H04M3/50 |
| 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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