发明名称 |
Educational geometrical instrument has indicator marker tracing the profile of a sinus curve |
摘要 |
<p>A geometrical instrument generates a sinus curve and illustrates the process in three dimensions. An indicator marker is attached to the outer periphery of the disc by a detachable strap whose length is equal to the sinus maximum height.</p> |
申请公布号 |
DE202005004960(U1) |
申请公布日期 |
2005.06.16 |
申请号 |
DE20052004960U |
申请日期 |
2005.03.30 |
申请人 |
JUST BETTINA |
发明人 |
|
分类号 |
G09B23/04;(IPC1-7):G09B23/04 |
主分类号 |
G09B23/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|