Portable air filter
USD304854S · kind S · design
15Cited by
4References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1988 |
| Grant date | Nov 28, 1989 |
| Priority date | — |
| Expiry date | Nov 28, 2003 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.