| Class Number |
Class Name |
No. of Patents |
| 454/902 |
Air raid shelter ventilation |
18 |
| 454/905 |
Black out means |
6 |
| 454/194 |
Blast or shock wave prevention |
15 |
| 454/1 |
Chimney or stack |
33 |
| 454/3 |
Chimneytop or stacktop structure (e.g., cowl) |
26 |
| 454/4 |
Cap closure |
30 |
| 454/5 |
Pivoted |
21 |
| 454/7 |
Having remote control |
13 |
| 454/6 |
Plural, separately pivoted portions |
1 |
| 454/34 |
Four-side outlets with shield |
3 |
| 454/39 |
Having air current inducing jet |
13 |
| 454/40 |
Plural, in-series jets |
4 |
| 454/20 |
Having air current responsive adjustment means |
5 |
| 454/26 |
Current regulator |
3 |
| 454/21 |
Wind vane |
6 |
| 454/25 |
Hood having outlet opening perpendicular to wind |
3 |
| 454/24 |
Shield |
1 |
| 454/22 |
With air current inducing jet |
4 |
| 454/23 |
Centered within induced air current |
0 |
| 454/27 |
Having readily movable air current regulating means |
5 |
| 454/29 |
Continuously horizontal panel |
7 |
| 454/30 |
Pivoted |
8 |
| 454/31 |
Plural |
4 |
| 454/28 |
With temperature sensitive release |
4 |
| 454/8 |
Inlet and outlet |
24 |
| 454/9 |
Having air current responsive adjustment means (e.g., wind vane, etc.) |
3 |
| 454/10 |
Inlet |
2 |
| 454/11 |
Having air current responsive adjustment means (e.g., wind vane, etc.) |
3 |
| 454/35 |
Spaced cap |
22 |
| 454/38 |
And skirt deflector extending outwardly from chimney or stack |
8 |
| 454/36 |
And spaced shield |
7 |
| 454/37 |
And skirt deflector extending outwardly from chimney or stack |
1 |
| 454/33 |
Spiral or plural stacked rings |
7 |
| 454/32 |
T-top |
2 |
| 454/12 |
With means for mounting on brick-type chimney |
20 |
| 454/13 |
Chimneytop structure extends within chimney |
7 |
| 454/14 |
Means for mounting to inner wall |
12 |
| 454/15 |
With rotary means in air current (e.g., fan, etc.) |
9 |
| 454/18 |
Cage-type blade set |
21 |
| 454/19 |
Including additional blade set |
6 |
| 454/16 |
Driven by external power source |
21 |
| 454/17 |
Having air current responsive adjustment means (e.g., wind vane, etc.) |
6 |
| 454/43 |
Having flue heater |
17 |
| 454/42 |
Having internal air current guide |
10 |
| 454/44 |
Having lining or sleeve |
23 |
| 454/47 |
Axially connected chimney or stack sections |
14 |
| 454/45 |
Including breech opening |
11 |
| 454/46 |
Pressurized air lining |
8 |
| 454/41 |
Having liquid drain |
7 |
| 454/2 |
Vehicle |
13 |
| 454/187 |
Clean room |
420 |
| 454/184 |
Electronic cabinet |
838 |
| 454/68 |
Elevator |
13 |
| 454/48 |
Exterior vault or manhole cover |
11 |
| 454/369 |
Fire damper |
101 |
| 454/903 |
Flexible ducts used for carrying air |
59 |
| 454/901 |
Fog dispeller |
2 |
| 454/237 |
Having both inlet and outlet airways |
50 |
| 454/239 |
Including automatic control means |
76 |
| 454/241 |
Including unitary inlet and outlet housing |
15 |
| 454/245 |
Air distributor with return vent (e.g., register, etc.) |
18 |
| 454/246 |
Baseboard type |
5 |
| 454/248 |
Ceiling type |
18 |
| 454/247 |
Floor type |
5 |
| 454/242 |
Rooftop |
9 |
| 454/243 |
Sleeved vent for ceiling, wall, or floor (e.g., thimble) |
6 |
| 454/244 |
With air pump means for both inlet and outlet airways |
8 |
| 454/249 |
With air pump |
14 |
| 454/250 |
Natural ventilation including air passage through rooftop (i.e., no air pump) |
43 |
| 454/238 |
Pressure regulation |
81 |
| 454/251 |
With air pump means |
83 |
| 454/252 |
For both inlet and outlet airways |
68 |
| 454/253 |
For outlet airway |
41 |
| 454/240 |
With wind-operated air pump |
3 |
| 454/228 |
Having forced recirculation |
51 |
| 454/236 |
For use with heating and cooling means |
131 |
| 454/230 |
Forced recirculation alone |
79 |
| 454/233 |
For use with heating or cooling means |
105 |
| 454/232 |
Having plural or branched recirculation ducts |
20 |
| 454/231 |
Having recirculating duct connecting upper and lower room air strata |
33 |
| 454/229 |
Including automatic control means |
96 |
| 454/234 |
Including unitary housing having both inlet and outlet airways |
32 |
| 454/235 |
Having air pump means for both airways |
13 |
| 454/254 |
Having inlet airway |
31 |
| 454/256 |
Including automatic control means |
141 |
| 454/258 |
Air temperature responsive |
97 |
| 454/257 |
Emergency smoke or fire responsive valve |
32 |
| 454/259 |
Including backdraft preventer |
57 |
| 454/284 |
Including specific air distributor (e.g., register, etc.) |
78 |
| 454/305 |
Air nozzle |
49 |
| 454/287 |
Baseboard type |
13 |
| 454/288 |
Including portion or element movable during normal use |
3 |
| 454/292 |
Ceiling type |
83 |
| 454/301 |
Including elongated output slot |
25 |
| 454/303 |
Having portion or element movable during normal use |
30 |
| 454/304 |
Pivoted |
25 |
| 454/302 |
Single, annular output slot |
21 |
| 454/296 |
Including perforated or porous element |
74 |
| 454/297 |
Having portion or element movable during normal use |
30 |
| 454/298 |
Axially movable or sliding valve |
23 |
| 454/299 |
Including plural vanes |
39 |
| 454/300 |
Concentric |
32 |
| 454/293 |
With light fixture |
22 |
| 454/294 |
Air passes over lamp |
15 |
| 454/295 |
Having adjustable valve |
11 |
| 454/289 |
Floor type |
49 |
| 454/290 |
Having adjustable valve |
63 |
| 454/291 |
With means for liquid contact |
13 |
| 454/307 |
Having air deflecting wall extending into room |
20 |
| 454/306 |
Having air duct extending into room |
115 |
| 454/286 |
Having airway joint with ball or cylinder rotatable in a socket |
33 |
| 454/330 |
Having register box, frame, or grating |
30 |
| 454/331 |
Including specific grating or grating mounting structure |
22 |
| 454/332 |
Readily moveable grating |
14 |
| 454/308 |
Having vanes or elongated output slots extending radially |
9 |
| 454/309 |
Louvered air distributor |
39 |
| 454/310 |
Concentric |
11 |
| 454/312 |
Having adjustable vane |
8 |
| 454/311 |
Having separate, adjustable internal damper |
8 |
| 454/321 |
In housing within room |
13 |
| 454/313 |
Moveable |
61 |
| 454/314 |
Aligned mutiple, movable sets of vanes |
13 |
| 454/315 |
Serially arranged sets |
64 |
| 454/318 |
Louver vanes form valve |
26 |
| 454/319 |
Plural vanes pivoting about individual axes |
55 |
| 454/320 |
Pivot at leading or trailing vane edge |
37 |
| 454/316 |
Repositionable set |
39 |
| 454/317 |
Rotating disks |
8 |
| 454/285 |
Sweeping type |
59 |
| 454/322 |
With adjustable valve |
35 |
| 454/323 |
Axially movable |
14 |
| 454/325 |
Plural blades pivoting along parrallel axes |
23 |
| 454/326 |
Adjacent blades pivot in opposing directions |
10 |
| 454/324 |
Sliding |
52 |
| 454/327 |
Valve opens by pivoting in upstream direction |
5 |
| 454/329 |
With air pump |
28 |
| 454/328 |
With means for liquid contact |
20 |
| 454/275 |
Including specific cover or shield for exterior vent opening |
34 |
| 454/276 |
Wall type |
38 |
| 454/277 |
Louver |
52 |
| 454/280 |
Formed in sheet member |
7 |
| 454/278 |
Having moveable vanes |
11 |
| 454/279 |
Having serially aligned vane sets |
8 |
| 454/281 |
Having specific vane supporting means |
6 |
| 454/282 |
In between vane ends |
3 |
| 454/283 |
With screen mounting means |
16 |
| 454/261 |
Including structure for mixing plural air streams together |
36 |
| 454/262 |
And having specific noise inhibiting structure |
16 |
| 454/269 |
With air pump |
33 |
| 454/265 |
With readily movable air regulating louver, damper, or cover |
20 |
| 454/266 |
Pivoted |
12 |
| 454/267 |
Plural |
18 |
| 454/268 |
Including parrallel louver vanes |
8 |
| 454/263 |
With shaped nozzle |
16 |
| 454/264 |
And readily movable air regulating louver, damper, or cover |
17 |
| 454/255 |
Pressure regulation |
43 |
| 454/270 |
Sleeved vent for ceiling, wall, or floor (e.g., thimble) |
27 |
| 454/271 |
Wall type |
31 |
| 454/273 |
Having adjustable valve |
22 |
| 454/274 |
Sliding or axially moveable |
19 |
| 454/272 |
With air pump |
3 |
| 454/260 |
Through roof eaves or rafters |
75 |
| 454/333 |
With adjustable valve (e.g., damper, etc.) |
99 |
| 454/334 |
Axially movable or sliding |
57 |
| 454/335 |
Plural blades pivoting along parallel axes |
51 |
| 454/336 |
Adjacent blades pivot in opposing directions |
13 |
| 454/338 |
With air pump |
124 |
| 454/337 |
With means for liquid contact |
46 |
| 454/339 |
Having outlet airway |
38 |
| 454/365 |
Along roof ridge |
187 |
| 454/357 |
Having emergency smoke handling feature |
28 |
| 454/358 |
Having readliy movable air regulating louver, damper, or cover |
58 |
| 454/364 |
Along roof ridge |
34 |
| 454/359 |
Including backdraft preventer |
75 |
| 454/360 |
Including counter balancing means |
12 |
| 454/361 |
Internal damper |
9 |
| 454/362 |
Continuously horizontal damper panel |
5 |
| 454/363 |
Pivoted damper panel |
20 |
| 454/367 |
Having specific cover or shield for exterior vent opening |
79 |
| 454/368 |
Exterior neck with enlarged, weather resistant cover |
48 |
| 454/340 |
Pressure regulation |
18 |
| 454/366 |
Slant roof ventilator |
78 |
| 454/341 |
With air pump |
66 |
| 454/342 |
And having specific emergency smoke handling structure |
44 |
| 454/354 |
Ceiling or wall mounted |
62 |
| 454/356 |
Having exterior neck with enlarged, weather resistant cover |
15 |
| 454/345 |
Having plural suction intakes |
30 |
| 454/347 |
Having readily movable air regulating louver,damper, or cover |
26 |
| 454/349 |
Ceiling mounted air pump |
25 |
| 454/348 |
Continuously horizontal damper panel |
7 |
| 454/353 |
Including backdraft preventer |
59 |
| 454/352 |
Plural damper panel |
9 |
| 454/350 |
Wall mounted air pump |
5 |
| 454/351 |
Plural damper panel |
14 |
| 454/343 |
Having specific air pump actuator |
65 |
| 454/346 |
Having vibration absorbing or preventing structure |
17 |
| 454/344 |
Pump induces draft in exit duct |
28 |
| 454/355 |
With movable access cover |
9 |
| 454/188 |
Having protecting air current |
111 |
| 454/193 |
Cabinet enclosure (e.g., display case, etc.) |
53 |
| 454/192 |
Including current adjusting mean |
32 |
| 454/190 |
Including plural, layered currents |
33 |
| 454/191 |
Including suction outlet |
49 |
| 454/189 |
Surrounding protected area |
49 |
| 454/908 |
Having rotary retarder |
0 |
| 454/185 |
Hollow partition |
69 |
| 454/186 |
Having blower |
78 |
| 454/904 |
Magnetic means to hold a damper closed |
6 |
| 454/195 |
Means combined with door |
70 |
| 454/196 |
Means combined with window |
22 |
| 454/198 |
Condensation preventer |
11 |
| 454/197 |
For bed or couch |
5 |
| 454/213 |
Having air passage at window top |
32 |
| 454/214 |
Having air passage between sill and bottom of sash |
7 |
| 454/221 |
Including louvers |
9 |
| 454/222 |
Including readily moveable air regulating means |
6 |
| 454/216 |
Including wall for upwardly deflecting inlet air |
1 |
| 454/217 |
Having adjustable angle or swingable mounting |
0 |
| 454/218 |
Including collapsible or flexible, perpendicular side wall |
0 |
| 454/219 |
Having readily moveable air regulating means |
2 |
| 454/220 |
Having slidably interconnected sections |
4 |
| 454/215 |
Including wall sloping downward from window |
3 |
| 454/223 |
With means for liquid contact |
2 |
| 454/211 |
Having air passage in sash |
9 |
| 454/212 |
Having air passage means within, attaching to, or replacing pane |
21 |
| 454/224 |
Having louvers |
15 |
| 454/226 |
Having wind deflector |
2 |
| 454/227 |
Including backdraft preventer |
8 |
| 454/199 |
Skylight |
14 |
| 454/225 |
Tilting pane window |
3 |
| 454/200 |
With air pump |
25 |
| 454/201 |
Cooling air conditioner |
36 |
| 454/202 |
Having readily moveable flow control means |
27 |
| 454/203 |
With extensible side panel |
4 |
| 454/204 |
With mounting or support means |
10 |
| 454/208 |
Propeller fan having rotary axis perpendicular to window |
12 |
| 454/210 |
With extensible side panel |
11 |
| 454/209 |
With mounting means for pump reversal |
3 |
| 454/205 |
Recirculation means |
5 |
| 454/207 |
With specific filtering means |
4 |
| 454/206 |
With specific noise inhibiting structure |
5 |
| 454/168 |
Mine |
28 |
| 454/171 |
Having inlet and outlet ductwork |
7 |
| 454/172 |
Having inlet ductwork |
8 |
| 454/169 |
With partition means (e.g., brattice, etc.) |
41 |
| 454/170 |
Flexible sheet |
22 |
| 454/370 |
Miscellaneous |
77 |
| 454/906 |
Noise inhibiting means |
101 |
| 454/909 |
Radon prevention |
47 |
| 454/907 |
Seat |
27 |
| 454/173 |
Storage area for perishables |
8 |
| 454/174 |
Harvested crop ventilation |
20 |
| 454/182 |
Granular crop or corn ears |
48 |
| 454/175 |
Having perforated or slotted duct contacting crop |
4 |
| 454/177 |
Horizontal and vertical perforated or slotted ducts |
0 |
| 454/178 |
With air pump |
2 |
| 454/179 |
Horizontal duct |
5 |
| 454/180 |
With air pump |
9 |
| 454/176 |
Including insertion means |
3 |
| 454/181 |
With air pump |
6 |
| 454/183 |
Provision safe |
2 |
| 454/69 |
Vehicle (e.g., automobile, etc.) |
135 |
| 454/76 |
Aircraft |
89 |
| 454/77 |
Freight |
5 |
| 454/121 |
Condensation preventer (e.g., defroster, etc.) |
231 |
| 454/123 |
Air directed at window exterior |
10 |
| 454/122 |
Air directed between double paned window |
3 |
| 454/127 |
Having dashboard air distributor (e.g., for windshield, etc.) |
84 |
| 454/126 |
Having means for combining heated and unheated air |
71 |
| 454/125 |
Having sweeping air distributor |
11 |
| 454/124 |
Side or rear window |
37 |
| 454/118 |
Freight |
47 |
| 454/75 |
Having automatic control means |
255 |
| 454/141 |
Having both inlet and outlet airways |
37 |
| 454/142 |
Including unitary inlet and outlet housing |
9 |
| 454/119 |
Having external connection |
21 |
| 454/139 |
Having forced recirculation |
94 |
| 454/140 |
Forced recirculation alone or agitating fan |
14 |
| 454/143 |
Having inlet airway |
96 |
| 454/144 |
Including duct extending along floor |
32 |
| 454/146 |
Including exterior cowl inlet |
35 |
| 454/148 |
Ducting to heat exchanger |
22 |
| 454/149 |
Having exterior door |
3 |
| 454/147 |
With moisture deflector or drain |
39 |
| 454/151 |
Including exterior rear or rear-side inlet |
14 |
| 454/150 |
Including exterior windshield inlet |
5 |
| 454/152 |
Including specific air distributor |
84 |
| 454/155 |
Having adjustable deflector |
153 |
| 454/154 |
Having swiveling nozzle |
31 |
| 454/153 |
Sweeping type |
23 |
| 454/145 |
Selective inlet, outlet, and closure |
31 |
| 454/156 |
With air treatment means |
257 |
| 454/159 |
Heating |
57 |
| 454/161 |
Having heat exchange core |
119 |
| 454/160 |
Having means for combining heated and unheated air |
140 |
| 454/157 |
Liquid contact |
44 |
| 454/158 |
Porous filter |
164 |
| 454/162 |
Having outlet airway |
69 |
| 454/165 |
Exterior rear outlet |
14 |
| 454/164 |
Exterior side outlet |
39 |
| 454/163 |
With current inducing jet |
3 |
| 454/128 |
Means for open window (e.g., deflector, etc.) |
23 |
| 454/135 |
Adjacent front edge of window |
14 |
| 454/131 |
At upper edge of sliding window |
33 |
| 454/132 |
Having means to selectively adjust airflow |
7 |
| 454/133 |
Having plural air passages |
8 |
| 454/134 |
Pivoted window |
4 |
| 454/129 |
Sunroof |
38 |
| 454/130 |
Windshield or rear window |
10 |
| 454/70 |
Pressure regulation |
31 |
| 454/71 |
Ventilation of aircraft cabin |
41 |
| 454/72 |
Auxiliary control system |
16 |
| 454/74 |
Control system having electrical or electronic component |
43 |
| 454/73 |
Mechanical operation of control system (e.g., by bellows or diaphragm, etc.) |
19 |
| 454/83 |
Railcar, bus, or trailer |
5 |
| 454/93 |
Condensation preventer (e.g., defroster, etc.) |
11 |
| 454/88 |
Freight |
8 |
| 454/89 |
Ice-bunker closure (e.g., for refrigerated railcar) |
1 |
| 454/90 |
Refrigerated or heated |
16 |
| 454/91 |
With air pump |
19 |
| 454/92 |
With air pump |
3 |
| 454/103 |
Having both inlet and outlet airways |
7 |
| 454/104 |
Including unitary inlet and outlet housing |
4 |
| 454/105 |
With air pump |
14 |
| 454/106 |
Wind or wheel-axle operated |
0 |
| 454/94 |
Having exterior cap closure for vent |
17 |
| 454/99 |
Having forced recirculation |
10 |
| 454/100 |
Having forced recirulation means alone |
6 |
| 454/102 |
Wheel-axle operated fan |
0 |
| 454/101 |
Wind-operated fan |
1 |
| 454/107 |
Having inlet airway |
4 |
| 454/108 |
Including specific air distributor |
16 |
| 454/109 |
Having adjustable deflector |
3 |
| 454/110 |
Liquid contact |
2 |
| 454/112 |
With air pump |
9 |
| 454/114 |
Wheel-axle operated |
0 |
| 454/113 |
Wind operated |
0 |
| 454/111 |
With deflecting separator-type filter |
2 |
| 454/115 |
Having outlet airway |
7 |
| 454/117 |
With air pump (e.g., wind or wheel-axle operated, etc.) |
5 |
| 454/116 |
With current inducing jet |
1 |
| 454/95 |
Having window or entry-door ventilation structure |
2 |
| 454/96 |
Including dust guard for window opening |
2 |
| 454/97 |
Inside of window |
1 |
| 454/98 |
Outside of window |
0 |
| 454/84 |
Locomotive cab |
5 |
| 454/85 |
Condensation preventer (e.g., defroster, etc.) |
5 |
| 454/86 |
Including dust guard for cab window opening |
1 |
| 454/87 |
Sleeping car |
1 |
| 454/136 |
Roof structure |
73 |
| 454/137 |
Including duct extending along roof |
55 |
| 454/138 |
Having exterior inlet opening over windshield |
12 |
| 454/120 |
Seat structure |
62 |
| 454/78 |
Waterborne |
28 |
| 454/79 |
Freight |
2 |
| 454/80 |
Nonperishable bulk foodstuff (e.g., grain ship) |
1 |
| 454/81 |
Porthole ventilator |
1 |
| 454/82 |
With moisture deflector or drain |
13 |
| 454/166 |
Vehicular tunnel |
10 |
| 454/167 |
With air pump |
5 |
| 454/900 |
Ventilator using solar power |
63 |
| 454/49 |
Workstation ventilator (e.g., hood, offtake, etc.) |
178 |
| 454/56 |
Covered workbench chamber (e.g., fume hood, etc.) |
166 |
| 454/57 |
Having air inlet separate from access opening |
97 |
| 454/60 |
And air outlet through access opening |
15 |
| 454/58 |
Including flow adjustment means |
28 |
| 454/59 |
Responsive to position of access door |
29 |
| 454/61 |
Having outlet airway flow adjustment means |
70 |
| 454/62 |
Plural airways with adjustable distribution means |
22 |
| 454/67 |
Having canopy exhaust hood |
104 |
| 454/66 |
Having inlet airway |
63 |
| 454/63 |
Movable |
128 |
| 454/65 |
Having canopy exhaust hood |
54 |
| 454/64 |
Having sliding, communication, airway duct sections |
48 |
| 454/50 |
Spray booth |
80 |
| 454/51 |
Having air inlet separate from access opening |
35 |
| 454/52 |
Ceiling inlet |
81 |
| 454/53 |
With outlet air treatment means |
99 |
| 454/54 |
With means for liquid contact |
95 |
| 454/55 |
Spraying nozzle |
24 |
