Conference telephone microphone control unit
USD277282S · kind S · design
15Cited by
6References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1982 |
| Grant date | Jan 22, 1985 |
| Priority date | — |
| Expiry date | Jan 22, 1999 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.