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| Class Numbers & Titles | Class Numbers Only | USPC Index | International | HELP |
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| You are viewing a USPC Schedule. |
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| Class 454 | VENTILATION |
| Click here for a printable version of this file | |
![[List of Pre Grant Publications for class 454 subclass 1]](../as.gif) | ![[List of Patents for class 454 subclass 1]](../ps.gif) | 1 | CHIMNEY OR STACK |
| | 2 |  Vehicle |
| | 3 | Chimneytop or stacktop structure (e.g., cowl) |
| | 4 |  Cap closure |
| | 8 | Inlet and outlet |
| | 10 | Inlet |
| | 12 | With means for mounting on brick-type chimney |
| | 15 | With rotary means in air current (e.g., fan, etc.) |
| | 16 |  Driven by external power source |
| | 17 | Having air current responsive adjustment means (e.g., wind vane, etc.) |
| | 18 | Cage-type blade set |
| | 20 | Having air current responsive adjustment means |
| | 21 | Wind vane |
| | 26 | Current regulator |
| | 27 | Having readily movable air current regulating means |
| | 32 | T-top |
| | 33 | Spiral or plural stacked rings |
| | 34 | Four-side outlets with shield |
| | 35 | Spaced cap |
| | 39 | Having air current inducing jet |
| | 41 | Having liquid drain |
| | 42 | Having internal air current guide |
| | 43 | Having flue heater |
| | 44 | Having lining or sleeve |
| | 48 | EXTERIOR VAULT OR MANHOLE COVER |
| | 49 | WORKSTATION VENTILATOR (E.G., HOOD, OFFTAKE, ETC.) |
| | 50 | Spray booth |
| | 56 | Covered workbench chamber (e.g., fume hood, etc.) |
| | 57 | Having air inlet separate from access opening |
| | 61 | Having outlet airway flow adjustment means |
| | 63 | Movable |
| | 66 | Having inlet airway |
| | 67 | Having canopy exhaust hood |
| | 68 | ELEVATOR |
| | 69 | VEHICLE (E.G., AUTOMOBILE, ETC.) |
| | 70 | Pressure regulation |
| | 75 | Having automatic control means |
| | 76 | Aircraft |
| | 78 | Waterborne |
| | 83 | Railcar, bus, or trailer |
| | 84 | Locomotive cab |
| | 87 | Sleeping car |
| | 88 | Freight |
| | 93 | Condensation preventer (e.g., defroster, etc.) |
| | 94 | Having exterior cap closure for vent |
| | 95 | Having window or entry-door ventilation structure |
| | 99 | Having forced recirculation |
| | 103 | Having both inlet and outlet airways |
| | 107 | Having inlet airway |
| | 108 | Including specific air distributor |
| | 110 | Liquid contact |
| | 111 | With deflecting separator-type filter |
| | 112 | With air pump |
| | 115 | Having outlet airway |
| | 118 | Freight |
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