Trackball for computer
USD326261S · kind S · design
30Cited by
5References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1991 |
| Grant date | May 19, 1992 |
| Priority date | — |
| Expiry date | May 19, 2006 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.