| 发明名称 |
SIGNAL SENDING UNIT FOR EXCHANGE |
| 摘要 |
PURPOSE:To secure an economical ocnstitution of exchange by installing as a limited number of common unit the sending gunit of bell sound, etc. through switching network by PNPN. element. |
| 申请公布号 |
JPS5264816(A) |
申请公布日期 |
1977.05.28 |
| 申请号 |
JP19750140175 |
申请日期 |
1975.11.25 |
| 申请人 |
OKI DENKI KOGYO KK;NIPPON DENSHIN DENWA KOSHA |
发明人 |
ITOU NOBORU;KIKUCHI AKIRA |
| 分类号 |
H04M19/02;H04Q3/52 |
主分类号 |
H04M19/02 |
| 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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