发明名称 |
TRANSFER SYSTEM OF KEY INFORMATION IN B BOARD |
摘要 |
PURPOSE:To economize the system by eanbling to constitute the system so that the distance between a scanner and a B board can practically be ignored, through the detection of operation of key contacts at a exchanger main body with the constitution of key contacts in the B board in matrix shape. |
申请公布号 |
JPS54506(A) |
申请公布日期 |
1979.01.05 |
申请号 |
JP19770064885 |
申请日期 |
1977.06.03 |
申请人 |
HITACHI LTD |
发明人 |
ABE KIYOHIKO;OONUMA TATSUMASA |
分类号 |
H04Q3/72;H04M3/60;H04M3/62 |
主分类号 |
H04Q3/72 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|