Air to air heat exchanger
USD330248S · kind S · design
10Cited by
21References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1990 |
| Grant date | Oct 13, 1992 |
| Priority date | — |
| Expiry date | Oct 13, 2006 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.