| 发明名称 |
Grounded surge protection unit for telephone subscriber circuits |
| 摘要 |
An improved surge protection unit suitable for use with Western Electric Type 66 blocks, having provision for grounding of the individual subscriber circuit at the block location is disclosed.
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| 申请公布号 |
US4758921(A) |
申请公布日期 |
1988.07.19 |
| 申请号 |
US19870017087 |
申请日期 |
1987.02.20 |
| 申请人 |
PORTA SYSTEMS CORP. |
发明人 |
HUNG, PETER |
| 分类号 |
H01T4/08;H04Q1/14;(IPC1-7):H02H3/22 |
主分类号 |
H01T4/08 |
| 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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