Roof air vent
US3938429A · kind A · utility
8Cited by
4References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 19, 1971 |
| Grant date | Feb 17, 1976 |
| Priority date | — |
| Expiry date | Sep 19, 1991 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24F13/068
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A roof air vent having rails mountable about an opening in a roof for forming a support bracket for one or more perforated panels. A pair of the rails are parallel to one another for forming tracks in which the panels are inserted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.