| 发明名称 |
Mobile phone for railway use has separate emergency loudspeaker avoids ear damage |
| 摘要 |
A mobile phone has an extra emergency loud speaker (7) louder than the loudspeaker (5) used when held against the ear and selected automatically for emergency announcements. The casing is waterproofed with an elastomer coating.
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| 申请公布号 |
FR2815219(A1) |
申请公布日期 |
2002.04.12 |
| 申请号 |
FR20000012921 |
申请日期 |
2000.10.10 |
| 申请人 |
SAGEM SA |
发明人 |
CHATAIN DAVID |
| 分类号 |
H04M1/03;H04M1/60;(IPC1-7):H04Q7/32 |
主分类号 |
H04M1/03 |
| 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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