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Class Information
Number: 454/251
Name: Ventilation > Having both inlet and outlet airways > With air pump means
Description: Subject matter comprising air moving means for forcing air into or out of the ventilated space.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7137881 |
Protective bed unit |
Nov. 21, 2006 |
| 7094142 |
Portable device with interchangeable air cleaning modules for cleaning the air outside of an existing enclosed space and delivering the cleaned air into the existing enclosed space |
Aug. 22, 2006 |
| 6979260 |
Method and device to prevent indoor release of carbon monoxide and smoke from combustors |
Dec. 27, 2005 |
| 6966830 |
Device for ventilation and/or air circulation |
Nov. 22, 2005 |
| 6958010 |
Crawl space ventilation system |
Oct. 25, 2005 |
| 6948553 |
Modular heat recovery ventilation system |
Sep. 27, 2005 |
| 6926602 |
Crawl space ventilation system |
Aug. 9, 2005 |
| 6843718 |
Method of guiding external air in a building shell and a building; and a method of temperature control of a building |
Jan. 18, 2005 |
| 6835128 |
Ceiling mounted air filtering and distribution apparatus operated independently of any HVAC system |
Dec. 28, 2004 |
| 6623351 |
Transportable collective protection system |
Sep. 23, 2003 |
| 6517430 |
Supply air system |
Feb. 11, 2003 |
| 6321997 |
Method for operating a stove in a building, and a device for carrying out this method |
Nov. 27, 2001 |
| 6287191 |
Combination bath fan, register box, air conditioning and heating boot |
Sep. 11, 2001 |
| 5725426 |
Portable and disposable sterilized operating environment |
Mar. 10, 1998 |
| 5722483 |
Air exchange apparatus and method |
Mar. 3, 1998 |
| 5718627 |
System and method for smoke free elevator shaft |
Feb. 17, 1998 |
| 5554071 |
Air-change system for a multi-storey building |
Sep. 10, 1996 |
| 5413529 |
Multi-component housing |
May. 9, 1995 |
| 5206173 |
Air hood |
Apr. 27, 1993 |
| 5194041 |
Ventilation system for isolators |
Mar. 16, 1993 |
| 5176316 |
System for alleviating and reducing moisture beneath a roofing structure |
Jan. 5, 1993 |
| 5173094 |
Positive-pressure filter arrangement for hazardous gases |
Dec. 22, 1992 |
| 5123874 |
Knock-down sound attenuating system |
Jun. 23, 1992 |
| 5101604 |
Subterranean well welding habitat |
Apr. 7, 1992 |
| 5097749 |
Rolling ramp inlet |
Mar. 24, 1992 |
| 4993484 |
Air to air heat exchanger |
Feb. 19, 1991 |
| 4982653 |
Method and apparatus for ventilating an enclosure accessed by a manhole |
Jan. 8, 1991 |
| 4955285 |
System for covering the energy requirement of a room |
Sep. 11, 1990 |
| 4953450 |
Crawl space ventilator system |
Sep. 4, 1990 |
| 4951555 |
Show case for keeping and exhibiting objects |
Aug. 28, 1990 |
| 4942805 |
Ventilated panel |
Jul. 24, 1990 |
| 4923352 |
System for manufacturing semiconductor under clean condition |
May. 8, 1990 |
| 4920866 |
Anti back draft device for flue |
May. 1, 1990 |
| 4917004 |
Robot traveling duct for clean room |
Apr. 17, 1990 |
| 4905579 |
Radon gas ventilation pump system and method |
Mar. 6, 1990 |
| 4892030 |
Airflow distribution system for discharging air from a thin plenum, and oven employing same |
Jan. 9, 1990 |
| 4874127 |
Climate control apparatus |
Oct. 17, 1989 |
| 4874042 |
Corrugated cardboard heat exchanger |
Oct. 17, 1989 |
| 4843786 |
Enclosure conditioned housing system |
Jul. 4, 1989 |
| 4838345 |
Combined air conditioning and ventilation assembly |
Jun. 13, 1989 |
| 4775001 |
Zoned air conditioning system |
Oct. 4, 1988 |
| 4773309 |
Heating and air conditioning system incorporating contaminant control |
Sep. 27, 1988 |
| 4717402 |
Air purification system |
Jan. 5, 1988 |
| 4705457 |
Monitoring of fluid flow |
Nov. 10, 1987 |
| 4646813 |
Multimode ventilator |
Mar. 3, 1987 |
| 4633768 |
Supplemental ventilation apparatus for manufactured housing |
Jan. 6, 1987 |
| 4617805 |
Air conditioner system for building |
Oct. 21, 1986 |
| 4604111 |
Particulate contamination control method and filtration device |
Aug. 5, 1986 |
| 4598631 |
Indoor gun firing range enclosure |
Jul. 8, 1986 |
| 4592270 |
Smoke and fire protection system for elevators |
Jun. 3, 1986 |
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