Dust respirator
USD259817S · kind S · design
4Cited by
5References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 10, 1979 |
| Grant date | Jul 7, 1981 |
| Priority date | — |
| Expiry date | Jul 7, 1995 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.