Breathing mask
USD250131S · kind S · design
262Cited by
7References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 18, 1976 |
| Grant date | Oct 31, 1978 |
| Priority date | — |
| Expiry date | Oct 31, 1992 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.