Medical face mask
USD277513S · kind S · design
5Cited by
8References
1Claims
0Family size
Inventors
Key dates
| Filing date | Mar 8, 1982 |
| Grant date | Feb 5, 1985 |
| Priority date | — |
| Expiry date | Feb 5, 1999 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.