Invertible trackball
US5008528A · kind A · utility
51Cited by
6References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 14, 1989 |
| Grant date | Apr 16, 1991 |
| Priority date | — |
| Expiry date | Jul 14, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/1632
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to cursor control devices for computers, and particularly relates to cursor control devices for personal computers which involve the use of a ball rotatable by the fingers for controlling cursor movement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.