Respiratory protection mask
USD424688S · kind S · design
45Cited by
20References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1997 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | May 9, 2014 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.