| 发明名称 |
MESSAGE BILLING METER OF PRIVATE BRANCH EXCHANGE |
| 摘要 |
PURPOSE:To economize the apparatus as well as to reduce metering errors, by making a main-wire additional unit multiply a basic pulse to generate a periodic pulse. |
| 申请公布号 |
JPS53119612(A) |
申请公布日期 |
1978.10.19 |
| 申请号 |
JP19770034290 |
申请日期 |
1977.03.28 |
| 申请人 |
IWATSU ELECTRIC CO LTD |
发明人 |
TANAKA HIDEAKI;IMAMURA MAKOTO;USHIO MASATO;NIWA YOSHINORI |
| 分类号 |
H04M15/34 |
主分类号 |
H04M15/34 |
| 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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