Respirator mask having a communication grille
USD741475S1 · kind S1 · design
2Cited by
67References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2015 |
| Grant date | Oct 20, 2015 |
| Priority date | — |
| Expiry date | Oct 20, 2029 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.