Personal respiratory protection device having an exhalation valve
USD431647S · kind S · design
53Cited by
26References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 6, 1996 |
| Grant date | Oct 3, 2000 |
| Priority date | — |
| Expiry date | Oct 3, 2014 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.