Hands-free intercommunication instrument
USD305121S · kind S · design
25Cited by
9References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 16, 1988 |
| Grant date | Dec 19, 1989 |
| Priority date | — |
| Expiry date | Dec 19, 2003 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.