Combined respiratory mask and inflatable head straps
USD304384S · kind S · design
71Cited by
6References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 21, 1986 |
| Grant date | Oct 31, 1989 |
| Priority date | — |
| Expiry date | Oct 31, 2003 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.