发明名称 |
Controllable cursor vacuum hold down |
摘要 |
A cursor for a digitizer is selectively made to adhere to the digitizing surface by the controlled application of a vacuum to the underside of the cursor. The control can reside either in a manually activated switch on the cursor, or in commands issued to the digitizer by its controlling device.
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申请公布号 |
US4301326(A) |
申请公布日期 |
1981.11.17 |
申请号 |
US19800167608 |
申请日期 |
1980.07.11 |
申请人 |
HEWLETT-PACKARD COMPANY |
发明人 |
HETZEL, HENRY T.;TREMBLAY, MICHAEL A. |
分类号 |
G06F3/033;(IPC1-7):G08C21/00;A45D42/14 |
主分类号 |
G06F3/033 |
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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