Key unit housing for a telephone call processor
USD307588S · kind S · design
4Cited by
20References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 23, 1988 |
| Grant date | May 1, 1990 |
| Priority date | — |
| Expiry date | May 1, 2004 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.