Combined gas treatment tube and enclosing guard tube
USD316897S · kind S · design
4Cited by
0References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1987 |
| Grant date | May 14, 1991 |
| Priority date | — |
| Expiry date | May 14, 2005 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.