PTO Manual of Classification for US patents

PTO Manual of Classification for US patents

What follows are the subclasses from one class of the Manual of Classification for US patents. As you scroll through the list and encounter a class/subclass of interest, you can jump back to the top and retrieve patent titles by entering the class/subclass in the box below.


Enter a class/subclass code here to get a list of patent titles. Use any of the following forms:
363-131 121-55A 14-.5
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Class Number: 454
 Class Title: VENTILATION

Subclass  Subclass
Number    Title

  1       CHIMNEY OR STACK
  2       .Vehicle
  3       .Chimneytop or stacktop structure (e.g., cowl)
  4       ..Cap closure
  5       ...Pivoted
  6       ....Plural, separately pivoted portions
  7       ....Having remote control
  8       ..Inlet and outlet
  9       ...Having air current responsive adjustment means (e.g., wind
              vane, etc.)
  10      ..Inlet
  11      ...Having air current responsive adjustment means (e.g., wind
              vane, etc.)
  12      ..With means for mounting on brick-type chimney
  13      ...Chimneytop structure extends within chimney
  14      ....Means for mounting to inner wall
  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
  19      ....Including additional blade set
  20      ..Having air current responsive adjustment means
  21      ...Wind vane
  22      ....With air current inducing jet
  23      .....Centered within induced air current
  24      ....Shield
  25      ....Hood having outlet opening perpendicular to wind
  26      ...Current regulator
  27      ..Having readily movable air current regulating means
  28      ...With temperature sensitive release
  29      ...Continuously horizontal panel
  30      ...Pivoted
  31      ....Plural
  32      ..T-top
  33      ..Spiral or plural stacked rings
  34      ..Four-side outlets with shield
  35      ..Spaced cap
  36      ...And spaced shield
  37      ....And skirt deflector extending outwardly from chimney or
               stack
  38      ...And skirt deflector extending outwardly from chimney or
              stack
  39      ..Having air current inducing jet
  40      ...Plural, in-series jets
  41      .Having liquid drain
  42      .Having internal air current guide
  43      .Having flue heater
  44      .Having lining or sleeve
  45      ..Including breech opening
  46      ..Pressurized air lining
  47      ..Axially connected chimney or stack sectionss
  48      EXTERIOR VAULT OR MANHOLE COVER
  49      WORKSTATION VENTILATOR (E.G., HOOD, OFFTAKE, ETC.)
  50      .Spray booth
  51      ..Having air inlet separate from access opening
  52      ...Ceiling inlet
  53      ..With outlet air treatment means
  54      ...With means for liquid contact
  55      ....Spraying nozzle
  56      .Covered workbench chamber (e.g., fume hood, etc.)
  57      ..Having air inlet separate from access opening
  58      ...Including flow adjustment means
  59      ....Responsive to position of access door
  60      ...And air outlet through access opening
  61      ..Having outlet airway flow adjustment means
  62      ...Plural airways with adjustable distribution means
  63      .Movable
  64      ..Having sliding, communication, airway duct sections
  65      ..Having canopy exhaust hood
  66      .Having inlet airway
  67      .Having canopy exhaust hood
  68      ELEVATOR
  69      VEHICLE (E.G., AUTOMOBILE, ETC.)
  70      .Pressure regulation
  71      ..Ventilation of aircraft cabin
  72      ...Auxiliary control system
  73      ...Mechanical operation of control system (e.g., by bellows or
              diaphragm, etc.)
  74      ...Control system having electrical or electronic component
  75      .Having automatic control means
  76      .Aircraft
  77      ..Freight
  78      .Waterborne
  79      ..Freight
  80      ...Nonperishable bulk foodstuff (e.g., grain ship)
  81      ..Porthole ventilator
  82      ..With moisture deflector or drain
  83      .Railcar, bus, or trailer
  84      ..Locomotive cab
  85      ...Condensation preventer (e.g., defroster, etc.)
  86      ...Including dust guard for cab window opening
  87      ..Sleeping car
  88      ..Freight
  89      ...Ice-bunker closure (e.g., for refrigerated railcar)
  90      ...Refrigerated or heated
  91      ....With air pump
  92      ...With air pump
  93      ..Condensation preventer (e.g., defroster, etc.)
  94      ..Having exterior cap closure for vent
  95      ..Having window or entry-door ventilation structure
  96      ...Including dust guard for window opening
  97      ....Inside of window
  98      ....Outside of window
  99      ..Having forced recirculation
  100     ...Having forced recirulation means alone
  101     ....Wind-operated fan
  102     ....Wheel-axle operated fan
  103     ..Having both inlet and outlet airways
  104     ...Including unitary inlet and outlet housingg
  105     ...With air pump
  106     ....Wind or wheel-axle operated
  107     ..Having inlet airway
  108     ...Including specific air distributor
  109     ....Having adjustable deflector
  110     ...Liquid contact
  111     ...With deflecting separator-type filter
  112     ...With air pump
  113     ....Wind operated
  114     ....Wheel-axle operated
  115     ..Having outlet airway
  116     ...With current inducing jet
  117     ...With air pump (e.g., wind or wheel-axle operated, etc.)
  118     .Freight
  119     .Having external connection
  120     .Seat structure
  121     .Condensation preventer (e.g., defroster, etc.)
  122     ..Air directed between double paned window
  123     ..Air directed at window exterior
  124     ..Side or rear window
  125     ..Having sweeping air distributor
  126     ..Having means for combining heated and unheated air
  127     ..Having dashboard air distributor (e.g., for windshield, etc.)
  128     .Means for open window (e.g., deflector, etc.)
  129     ..Sunroof
  130     ..Windshield or rear window
  131     ..At upper edge of sliding window
  132     ...Having means to selectively adjust airflow
  133     ...Having plural air passages
  134     ..Pivoted window
  135     ..Adjacent front edge of window
  136     .Roof structure
  137     ..Including duct extending along roof
  138     ...Having exterior inlet opening over windshield
  139     .Having forced recirculation
  140     ..Forced recirculation alone or agitating fan
  141     .Having both inlet and outlet airways
  142     ..Including unitary inlet and outlet housing
  143     .Having inlet airway
  144     ..Including duct extending along floor
  145     ..Selective inlet, outlet, and closure
  146     ..Including exterior cowl inlet
  147     ...With moisture deflector or drain
  148     ...Ducting to heat exchanger
  149     ...Having exterior door
  150     ..Including exterior windshield inlet
  151     ..Including exterior rear or rear-side inlet
  152     ..Including specific air distributor
  153     ...Sweeping type
  154     ...Having swiveling nozzle
  155     ...Having adjustable deflector
  156     ..With air treatment means
  157     ...Liquid contact
  158     ...Porous filter
  159     ...Heating
  160     ....Having means for combining heated and unheated air
  161     ....Having heat exchange core
  162     .Having outlet airwayy
  163     ..With current inducing jet
  164     ..Exterior side outlet
  165     ..Exterior rear outlet
  166     VEHICULAR TUNNEL
  167     .With air pump
  168     MINE
  169     .With partition means (e.g., brattice, etc.)
  170     ..Flexible sheet
  171     .Having inlet and outlet ductwork
  172     .Having inlet ductwork
  173     STORAGE AREA FOR PERISHABLES
  174     .Harvested crop ventilation
  175     ..Having perforated or slotted duct contacting crop
  176     ...Including insertion means
  177     ...Horizontal and vertical perforated or slotted ducts
  178     ....With air pump
  179     ...Horizontal duct
  180     ....With air pump
  181     ...With air pump
  182     ..Granular crop or corn ears
  183     .Provision safe
  184     ELECTRONIC CABINET
  185     HOLLOW PARTITION
  186     .Having blower
  187     CLEAN ROOM
  188     HAVING PROTECTING AIR CURRENT
  189     .Surrounding protected area
  190     .Including plural, layered currents
  191     .Including suction outlet
  192     .Including current adjusting mean
  193     .Cabinet enclosure (e.g., display case, etc.)
  194     BLAST OR SHOCK WAVE PREVENTION
  195     MEANS COMBINED WITH DOOR
  196     MEANS COMBINED WITH WINDOW
  197     .For bed or couch
  198     .Condensation preventer
  199     .Skylight
  200     .With air pump
  201     ..Cooling air conditioner
  202     ...Having readily moveable flow control means
  203     ...With extensible side panel
  204     ...With mounting or support means
  205     ..Recirculation means
  206     ..With specific noise inhibiting structure
  207     ..With specific filtering means
  208     ..Propeller fan having rotary axis perpendicular to window
  209     ...With mounting means for pump reversal
  210     ...With extensible side panel
  211     .Having air passage in sash
  212     .Having air passage means within, attaching to, or replacing
            pane
  213     .Having air passage at window top
  214     .Having air passage between sill and bottom of sash
  215     ..Including wall sloping downward from window
  216     ..Including wall for upwardly deflecting inlet air
  217     ...Having adjustable angle or swingable mounting
  218     ....Including collapsible or flexible, perpendicular side wall
  219     ...Having readily moveable air regulating meanss
  220     ...Having slidably interconnected sections
  221     ..Including louvers
  222     ..Including readily moveable air regulating means
  223     ..With means for liquid contact
  224     .Having louvers
  225     .Tilting pane window
  226     .Having wind deflector
  227     .Including backdraft preventer
  228     HAVING FORCED RECIRCULATION
  229     .Including automatic control means
  230     .Forced recirculation alone
  231     ..Having recirculating duct connecting upper and lower room air
             strata
  232     ..Having plural or branched recirculation ducts
  233     ..For use with heating or cooling means
  234     .Including unitary housing having both inlet and outlet airways
  235     ..Having air pump means for both airways
  236     .For use with heating and cooling means
  237     HAVING BOTH INLET AND OUTLET AIRWAYS
  238     .Pressure regulation
  239     .Including automatic control means
  240     .With wind-operated air pump
  241     .Including unitary inlet and outlet housing
  242     ..Rooftop
  243     ..Sleeved vent for ceiling, wall, or floor (e.g., thimble)
  244     ...With air pump means for both inlet and outlet airways
  245     ..Air distributor with return vent (e.g., register, etc.)
  246     ...Baseboard type
  247     ...Floor type
  248     ...Ceiling type
  249     ..With air pump
  250     .Natural ventilation including air passage through rooftop
            (i.e., no air pump)
  251     .With air pump means
  252     ..For both inlet and outlet airways
  253     ..For outlet airway
  254     HAVING INLET AIRWAY
  255     .Pressure regulation
  256     .Including automatic control means
  257     ..Emergency smoke or fire responsive valve
  258     ..Air temperature responsive
  259     .Including backdraft preventer
  260     .Through roof eaves or rafters
  261     .Including structure for mixing plural air streams together
  262     ..And having specific noise inhibiting structure
  263     ..With shaped nozzle
  264     ...And readily movable air regulating louver, damper, or cover
  265     ..With readily movable air regulating louver, damper, or cover
  266     ...Pivoted
  267     ....Plural
  268     .....Including parrallel louver vanes
  269     ..With air pump
  270     .Sleeved vent for ceiling, wall, or floor (e.g., thimble)
  271     ..Wall type
  272     ...With air pump
  273     ...Having adjustable valve
  274     ....Sliding or axially moveable
  275     .Including specific cover or shield for exterior vent openingg
  276     ..Wall type
  277     ...Louver
  278     ....Having moveable vanes
  279     ....Having serially aligned vane sets
  280     ....Formed in sheet member
  281     ....Having specific vane supporting means
  282     .....In between vane ends
  283     ....With screen mounting means
  284     .Including specific air distributor (e.g., register, etc.)
  285     ..Sweeping type
  286     ..Having airway joint with ball or cylinder rotatable in a
             socket
  287     ..Baseboard type
  288     ...Including portion or element movable during normal use
  289     ..Floor type
  290     ...Having adjustable valve
  291     ...With means for liquid contact
  292     ..Ceiling type
  293     ...With light fixture
  294     ....Air passes over lamp
  295     ....Having adjustable valve
  296     ...Including perforated or porous element
  297     ....Having portion or element movable during normal use
  298     .....Axially movable or sliding valve
  299     ...Including plural vanes
  300     ....Concentric
  301     ...Including elongated output slot
  302     ....Single, annular output slot
  303     ....Having portion or element movable during normal use
  304     .....Pivoted
  305     ..Air nozzle
  306     ..Having air duct extending into room
  307     ..Having air deflecting wall extending into room
  308     ..Having vanes or elongated output slots extending radially
  309     ..Louvered air distributor
  310     ...Concentric
  311     ....Having separate, adjustable internal damper
  312     ....Having adjustable vane
  313     ...Moveable
  314     ....Aligned mutiple, movable sets of vanes
  315     .....Serially arranged sets
  316     ....Repositionable set
  317     ....Rotating disks
  318     ....Louver vanes form valve
  319     ....Plural vanes pivoting about individual axes
  320     .....Pivot at leading or trailing vane edge
  321     ...In housing within room
  322     ..With adjustable valve
  323     ...Axially movable
  324     ...Sliding
  325     ...Plural blades pivoting along parrallel axes
  326     ....Adjacent blades pivot in opposing directions
  327     ...Valve opens by pivoting in upstream direction
  328     ..With means for liquid contact
  329     ..With air pump
  330     ..Having register box, frame, or grating
  331     ...Including specific grating or grating mounting structure
  332     ....Readily moveable gratingg
  333     .With adjustable valve (e.g., damper, etc.)
  334     ..Axially movable or sliding
  335     ..Plural blades pivoting along parallel axes
  336     ...Adjacent blades pivot in opposing directions
  337     .With means for liquid contact
  338     .With air pump
  339     HAVING OUTLET AIRWAY
  340     .Pressure regulation
  341     .With air pump
  342     ..And having specific emergency smoke handling structure
  343     ..Having specific air pump actuator
  344     ..Pump induces draft in exit duct
  345     ..Having plural suction intakes
  346     ..Having vibration absorbing or preventing structure
  347     ..Having readily movable air regulating louver,damper, or cover
  348     ...Continuously horizontal damper panel
  349     ...Ceiling mounted air pump
  350     ...Wall mounted air pump
  351     ....Plural damper panel
  352     ...Plural damper panel
  353     ...Including backdraft preventer
  354     ..Ceiling or wall mounted
  355     ..With movable access cover
  356     ..Having exterior neck with enlarged, weather resistant cover
  357     .Having emergency smoke handling feature
  358     .Having readliy movable air regulating louver, damper, or cover
  359     ..Including backdraft preventer
  360     ...Including counter balancing means
  361     ..Internal damper
  362     ...Continuously horizontal damper panel
  363     ...Pivoted damper panel
  364     ..Along roof ridge
  365     .Along roof ridge
  366     .Slant roof ventilator
  367     .Having specific cover or shield for exterior vent opening
  368     ..Exterior neck with enlarged, weather resistant cover
  369     FIRE DAMPER
  370     MISCELLANEOUS
  *       ******************************
  *       CROSS-REFERENCE ART COLLECTIONS
  *       ******************************
  900     VENTILATOR USING SOLAR POWER
  901     FOG DISPELLER
  902     AIR RAID SHELTER VENTILATION
  903     FLEIXBLE DUCTS USED FOR CARRING AIR
  904     MAGNETIC MEANS TO HOLD A DAMPER CLOSED
  905     BLACK OUT MEANS
  906     NOISE INHIBITING MEANS
  907     SEAT
  908     HAVING ROTARY RETARDER
  909     RADON PREVENTION