发明名称 |
POLARIZED ELEMENT DRIVING BRIDGE TYPE COMPOSITE MATRIX SYSTEM |
摘要 |
PURPOSE:To improve the mounting efficiency, reliability and economization of the device employing polarized elements by using diodes instead of contact points of a multicontact relay in an automatic telephone exchange. |
申请公布号 |
JPS52101909(A) |
申请公布日期 |
1977.08.26 |
申请号 |
JP19760017929 |
申请日期 |
1976.02.23 |
申请人 |
HITACHI LTD;NIPPON TELEGRAPH & TELEPHONE |
发明人 |
SATOU ISAO;INOUE KOUJI;HANABE KENICHI;TSUCHIYA KEIJI |
分类号 |
H04Q3/64;H04Q3/00 |
主分类号 |
H04Q3/64 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|