Digital communication switching exchange
USD293791S · kind S · design
10Cited by
3References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1985 |
| Grant date | Jan 19, 1988 |
| Priority date | — |
| Expiry date | Jan 19, 2002 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.