Extension calling unit for telephone
USD389156S · kind S · design
4Cited by
13References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1996 |
| Grant date | Jan 13, 1998 |
| Priority date | — |
| Expiry date | Jan 13, 2012 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.