| 发明名称 |
SHUNT TYPE CURRENT SWITCHING SCANNING METHOD |
| 摘要 |
PURPOSE:To distinguish originating call of a telephone and to economize the device by providing a shunt resistor in a current switching scanning circuit in an automatic telephone exchange. |
| 申请公布号 |
JPS52101907(A) |
申请公布日期 |
1977.08.26 |
| 申请号 |
JP19760017933 |
申请日期 |
1976.02.23 |
| 申请人 |
HITACHI LTD;NIPPON TELEGRAPH & TELEPHONE |
发明人 |
SEKI SHIGEO;HISAMURA MAKOTO;UENO TAKAO;ISHIZAWA AKIRA |
| 分类号 |
H04Q3/72;H04Q3/00 |
主分类号 |
H04Q3/72 |
| 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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