Telephone network interface apparatus
USD313803S · kind S · design
6Cited by
11References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1988 |
| Grant date | Jan 15, 1991 |
| Priority date | — |
| Expiry date | Jan 15, 2005 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.