发明名称 |
Portable telephone apparatus having built-in option circuit |
摘要 |
In a portable telephone apparatus selectively operable in a portable mode or in an on-board mode, an option circuit is built in a chargeable battery pack for adding an extra function to a telephone. A plurality of keys are arranged on the telephone and operable to cause the telephone and option circuit to interchange speech signals and control signals and to start and stop operating.
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申请公布号 |
US5832391(A) |
申请公布日期 |
1998.11.03 |
申请号 |
US19960659772 |
申请日期 |
1996.06.06 |
申请人 |
NEC CORPORATION |
发明人 |
KOMODA, MOTOYOSHI;KATSUMATA, MINORU |
分类号 |
H04B7/26;H04B1/38;H04M1/02;H04M1/725;H04Q7/38;(IPC1-7):H04Q7/32 |
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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