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[Search a list of Patent Appplications for class 454]  Class   454VENTILATION
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   [List of Patents for class 454 subclass 1]  1           CHIMNEY OR STACK
    [List of Patents for class 454 subclass 2]  2           Subclass 2 indent level is 1 Vehicle
   [List of Patents for class 454 subclass 3]  3           Subclass 3 indent level is 1 Chimneytop or stacktop structure (e.g., cowl)
   [List of Patents for class 454 subclass 4]  4           Subclass 4 indent level is 2 Cap closure
   [List of Patents for class 454 subclass 5]  5           Subclass 5 indent level is 3 Pivoted
    [List of Patents for class 454 subclass 6]  6           Subclass 6 indent level is 4 Plural, separately pivoted portions
    [List of Patents for class 454 subclass 7]  7           Subclass 7 indent level is 4 Having remote control
   [List of Patents for class 454 subclass 8]  8           Subclass 8 indent level is 2 Inlet and outlet
   [List of Patents for class 454 subclass 10]  10           Subclass 10 indent level is 2 Inlet
   [List of Patents for class 454 subclass 12]  12           Subclass 12 indent level is 2 With means for mounting on brick-type chimney
   [List of Patents for class 454 subclass 15]  15           Subclass 15 indent level is 2 With rotary means in air current (e.g., fan, etc.)
   [List of Patents for class 454 subclass 20]  20           Subclass 20 indent level is 2 Having air current responsive adjustment means
   [List of Patents for class 454 subclass 21]  21           Subclass 21 indent level is 3 Wind vane
   [List of Patents for class 454 subclass 22]  22           Subclass 22 indent level is 4 With air current inducing jet
    [List of Patents for class 454 subclass 23]  23           Subclass 23 indent level is 5 Centered within induced air current
    [List of Patents for class 454 subclass 24]  24           Subclass 24 indent level is 4 Shield
    [List of Patents for class 454 subclass 25]  25           Subclass 25 indent level is 4 Hood having outlet opening perpendicular to wind
    [List of Patents for class 454 subclass 26]  26           Subclass 26 indent level is 3 Current regulator
   [List of Patents for class 454 subclass 27]  27           Subclass 27 indent level is 2 Having readily movable air current regulating means
    [List of Patents for class 454 subclass 28]  28           Subclass 28 indent level is 3 With temperature sensitive release
    [List of Patents for class 454 subclass 29]  29           Subclass 29 indent level is 3 Continuously horizontal panel
   [List of Patents for class 454 subclass 30]  30           Subclass 30 indent level is 3 Pivoted
    [List of Patents for class 454 subclass 31]  31           Subclass 31 indent level is 4 Plural
    [List of Patents for class 454 subclass 32]  32           Subclass 32 indent level is 2 T-top
    [List of Patents for class 454 subclass 33]  33           Subclass 33 indent level is 2 Spiral or plural stacked rings
    [List of Patents for class 454 subclass 34]  34           Subclass 34 indent level is 2 Four-side outlets with shield
   [List of Patents for class 454 subclass 35]  35           Subclass 35 indent level is 2 Spaced cap
   [List of Patents for class 454 subclass 39]  39           Subclass 39 indent level is 2 Having air current inducing jet
    [List of Patents for class 454 subclass 40]  40           Subclass 40 indent level is 3 Plural, in-series jets
    [List of Patents for class 454 subclass 41]  41           Subclass 41 indent level is 1 Having liquid drain
    [List of Patents for class 454 subclass 42]  42           Subclass 42 indent level is 1 Having internal air current guide
    [List of Patents for class 454 subclass 43]  43           Subclass 43 indent level is 1 Having flue heater
   [List of Patents for class 454 subclass 44]  44           Subclass 44 indent level is 1 Having lining or sleeve
    [List of Patents for class 454 subclass 45]  45           Subclass 45 indent level is 2 Including breech opening
    [List of Patents for class 454 subclass 46]  46           Subclass 46 indent level is 2 Pressurized air lining
    [List of Patents for class 454 subclass 47]  47           Subclass 47 indent level is 2 Axially connected chimney or stack sections
    [List of Patents for class 454 subclass 48]  48           EXTERIOR VAULT OR MANHOLE COVER
   [List of Patents for class 454 subclass 49]  49           WORKSTATION VENTILATOR (E.G., HOOD, OFFTAKE, ETC.)
   [List of Patents for class 454 subclass 50]  50           Subclass 50 indent level is 1 Spray booth
   [List of Patents for class 454 subclass 51]  51           Subclass 51 indent level is 2 Having air inlet separate from access opening
    [List of Patents for class 454 subclass 52]  52           Subclass 52 indent level is 3 Ceiling inlet
   [List of Patents for class 454 subclass 53]  53           Subclass 53 indent level is 2 With outlet air treatment means
   [List of Patents for class 454 subclass 54]  54           Subclass 54 indent level is 3 With means for liquid contact
    [List of Patents for class 454 subclass 55]  55           Subclass 55 indent level is 4 Spraying nozzle
   [List of Patents for class 454 subclass 56]  56           Subclass 56 indent level is 1 Covered workbench chamber (e.g., fume hood, etc.)
   [List of Patents for class 454 subclass 57]  57           Subclass 57 indent level is 2 Having air inlet separate from access opening
   [List of Patents for class 454 subclass 58]  58           Subclass 58 indent level is 3 Including flow adjustment means
    [List of Patents for class 454 subclass 59]  59           Subclass 59 indent level is 4 Responsive to position of access door
    [List of Patents for class 454 subclass 60]  60           Subclass 60 indent level is 3 And air outlet through access opening
   [List of Patents for class 454 subclass 61]  61           Subclass 61 indent level is 2 Having outlet airway flow adjustment means
   [List of Patents for class 454 subclass 63]  63           Subclass 63 indent level is 1 Movable
    [List of Patents for class 454 subclass 64]  64           Subclass 64 indent level is 2 Having sliding, communication, airway duct sections
    [List of Patents for class 454 subclass 65]  65           Subclass 65 indent level is 2 Having canopy exhaust hood
    [List of Patents for class 454 subclass 66]  66           Subclass 66 indent level is 1 Having inlet airway
    [List of Patents for class 454 subclass 67]  67           Subclass 67 indent level is 1 Having canopy exhaust hood
    [List of Patents for class 454 subclass 68]  68           ELEVATOR
   [List of Patents for class 454 subclass 69]  69           VEHICLE (E.G., AUTOMOBILE, ETC.)
   [List of Patents for class 454 subclass 70]  70           Subclass 70 indent level is 1 Pressure regulation
   [List of Patents for class 454 subclass 71]  71           Subclass 71 indent level is 2 Ventilation of aircraft cabin
    [List of Patents for class 454 subclass 75]  75           Subclass 75 indent level is 1 Having automatic control means
   [List of Patents for class 454 subclass 76]  76           Subclass 76 indent level is 1 Aircraft
    [List of Patents for class 454 subclass 77]  77           Subclass 77 indent level is 2 Freight
   [List of Patents for class 454 subclass 78]  78           Subclass 78 indent level is 1 Waterborne
   [List of Patents for class 454 subclass 79]  79           Subclass 79 indent level is 2 Freight
    [List of Patents for class 454 subclass 81]  81           Subclass 81 indent level is 2 Porthole ventilator
    [List of Patents for class 454 subclass 82]  82           Subclass 82 indent level is 2 With moisture deflector or drain
   [List of Patents for class 454 subclass 83]  83           Subclass 83 indent level is 1 Railcar, bus, or trailer
   [List of Patents for class 454 subclass 84]  84           Subclass 84 indent level is 2 Locomotive cab
    [List of Patents for class 454 subclass 87]  87           Subclass 87 indent level is 2 Sleeping car
   [List of Patents for class 454 subclass 88]  88           Subclass 88 indent level is 2 Freight
    [List of Patents for class 454 subclass 89]  89           Subclass 89 indent level is 3 Ice-bunker closure (e.g., for refrigerated railcar)
   [List of Patents for class 454 subclass 90]  90           Subclass 90 indent level is 3 Refrigerated or heated
    [List of Patents for class 454 subclass 91]  91           Subclass 91 indent level is 4 With air pump
    [List of Patents for class 454 subclass 92]  92           Subclass 92 indent level is 3 With air pump
    [List of Patents for class 454 subclass 93]  93           Subclass 93 indent level is 2 Condensation preventer (e.g., defroster, etc.)
    [List of Patents for class 454 subclass 94]  94           Subclass 94 indent level is 2 Having exterior cap closure for vent
   [List of Patents for class 454 subclass 95]  95           Subclass 95 indent level is 2 Having window or entry-door ventilation structure
   [List of Patents for class 454 subclass 96]  96           Subclass 96 indent level is 3 Including dust guard for window opening
    [List of Patents for class 454 subclass 97]  97           Subclass 97 indent level is 4 Inside of window
    [List of Patents for class 454 subclass 98]  98           Subclass 98 indent level is 4 Outside of window
   [List of Patents for class 454 subclass 99]  99           Subclass 99 indent level is 2 Having forced recirculation
   [List of Patents for class 454 subclass 100]  100           Subclass 100 indent level is 3 Having forced recirulation means alone
    [List of Patents for class 454 subclass 101]  101           Subclass 101 indent level is 4 Wind-operated fan
    [List of Patents for class 454 subclass 102]  102           Subclass 102 indent level is 4 Wheel-axle operated fan
   [List of Patents for class 454 subclass 103]  103           Subclass 103 indent level is 2 Having both inlet and outlet airways
    [List of Patents for class 454 subclass 104]  104           Subclass 104 indent level is 3 Including unitary inlet and outlet housing
   [List of Patents for class 454 subclass 105]  105           Subclass 105 indent level is 3 With air pump
    [List of Patents for class 454 subclass 106]  106           Subclass 106 indent level is 4 Wind or wheel-axle operated
   [List of Patents for class 454 subclass 107]