| 发明名称 |
Portable PC keyboard with built in tracker ball |
| 摘要 |
The keyboard has a conventional keyboard design, diagonally divided and separated linearly into two sections by about 10-11 cm. The rectangular block of control keys is between the two halves. The centre section has a cut out with angled support surfaces on either side. A roller track ball is positioned at the cut out.
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| 申请公布号 |
DE4338733(A1) |
申请公布日期 |
1995.05.18 |
| 申请号 |
DE19934338733 |
申请日期 |
1993.11.12 |
| 申请人 |
NIEBERLE, JAN, 22607 HAMBURG, DE |
发明人 |
NIEBERLE, JAN, 22607 HAMBURG, DE |
| 分类号 |
G06F3/02;G06F3/023;(IPC1-7):G06F3/023;G06F3/033 |
主分类号 |
G06F3/02 |
| 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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