发明名称 |
Portable radio telephone having power saver |
摘要 |
A battery-powered portable radio telephone for use in a mobile telephone network receives signals from the network and judges from the received signal whether the radio telephone is inside or outside of the service area of the network. A battery saver is provided to periodically interrupt the battery power of the telephone when the latter is judged as being outside of the service area. |
申请公布号 |
US4903319(A) |
申请公布日期 |
1990.02.20 |
申请号 |
US19870077137 |
申请日期 |
1987.07.23 |
申请人 |
NEC CORPORATION |
发明人 |
KASAI, YOSHIHIKO;BABANO, SOTOAKI |
分类号 |
H04B7/26;H04B1/16;H04B1/40;H04M1/73;H04W52/02 |
主分类号 |
H04B7/26 |
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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