| 发明名称 |
Time sound generating device |
| 摘要 |
A time sound generating device which generates a time announcement sound by detecting a change of time from a portion of a display element driving signal supplied to a time display element of a digital electronic clock and by driving an audio sound signal source by the detected time signal.
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| 申请公布号 |
US4293940(A) |
申请公布日期 |
1981.10.06 |
| 申请号 |
US19780912535 |
申请日期 |
1978.06.05 |
| 申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
NOGUCHI, SATOSHI;KITAO, TAKAYA |
| 分类号 |
G04G13/00;(IPC1-7):G04B21/02;G04C23/00;G04B23/02;G04C21/16 |
主分类号 |
G04G13/00 |
| 代理机构 |
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