Filtration unit for exhaust air from a clean room helmet worn for a sterile environment or the like
USD298473S · kind S · design
14Cited by
6References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 22, 1986 |
| Grant date | Nov 8, 1988 |
| Priority date | — |
| Expiry date | Nov 8, 2002 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.