Surface pattern for a nose and mouth air-filtering mask
USD421117S · kind S · design
8Cited by
8References
1Claims
0Family size
Inventor
Key dates
| Filing date | Apr 7, 1998 |
| Grant date | Feb 22, 2000 |
| Priority date | — |
| Expiry date | Feb 22, 2014 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.