Breathing gas mask
USD271144S · kind S · design
4Cited by
10References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 6, 1981 |
| Grant date | Oct 25, 1983 |
| Priority date | — |
| Expiry date | Oct 25, 1997 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.