| 发明名称 |
TIME SIGNAL CLOCK |
| 摘要 |
PURPOSE:To know accurate time by detecting time by a s lead switch and a permanent magnet, effecting a time signal by a buffer and a speaker, and making adjustable a time interval and a tone quality of a time signal sound. |
| 申请公布号 |
JPS5246852(A) |
申请公布日期 |
1977.04.14 |
| 申请号 |
JP19750122681 |
申请日期 |
1975.10.09 |
| 申请人 |
MATSUSHITA ELECTRIC IND CO LTD |
发明人 |
HATADA KENZOU;ISHIHARA TAKESHI;KAWAKAMI HIROHEI |
| 分类号 |
G04G13/00;G04C3/14;G04C21/12;G04C23/20 |
主分类号 |
G04G13/00 |
| 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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