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.
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363-131 121-55A 14-.5
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subclass letters capitalized. Currently Design Patent titles (those in the
classes of the form Dxx.yy) are not retreivable.
Class Number: D23
Class Title: ENVIRONMENTAL HEATING AND COOLING; FLUID HANDLING AND
SANITARY EQUIPMENT
Subclass Subclass
Number Title
200 FLUID HANDLING OR TREATMENT EQUIPMENT (1)
201 .Fountain
202 .Storage tank
203 ..Underground type (e.g., septic tank, etc.)
204 ..Substantially spherical
205 ..Cylindrical
206 ..Element or attachment (2)
207 .Treatment
208 ..Sanitary fixture type (e.g., deodorant holder, chemical
dispenser, etc.)
209 ..Filter or strainer (3)
210 ...Immersion type (e.g., aquarium filter, etc.)
211 .Lubricating can
212 .Watering can (4)
213 .Dispersal (i.e., sprayer, fogger, nozzle, aerator, etc.) (5)
214 ..Sprinkler for lawn, agricultural irrigation or fire
extinguishing (6)
215 ...Simulative
216 ...Oscillating
217 ...With surface penetration means
218 ...Recessed type
219 ...Tracking type (i.e., sprinkler follows hose, etc.)
220 ...Plural rotating arms
221 ...Base
222 ..Simulative
223 ..Hand held or controlled type
224 ...Direct piston or plunger actuation (i.e., without trigger or
lever)
225 ...With material container (7)
226 ...Trigger, lever or button actuation
227 ....Cover or guard
228 ..Combined
229 ..Provision for adjustment of spray pattern or flow
230 ..Ball and socket joint for adjustment
231 .Hand or foot operated pump or well curb
232 ..Reciprocating lever actuated
233 .Valve or body therefor
234 ..Hydrant
235 ..Pressure regulating or relieving
236 ..Ballcock or float type
237 ..Check
238 ..Faucet fixture (8)
239 ...Combined (e.g., with dishwashing brush, support therefor,
etc.)
240 ....With soap dish or with provision therefor
241 ...Plural flow controls or provision therefor
242 ....Distinct (i.e., when mounted, controls and spout are
separated)
243 ....Pivoting spout
244 ..Gate or butterfly type
245 ..Manual or visible mechanical control or with provisionn
therefor (e.g., handle, lever, etc.)
246 ...With gauge or dial (9)
247 ..Symmetrical on two or more axes
248 ..Symmetrical on one axis
249 ..Element or attachment
250 ...Handle
251 ....Simulative
252 ....Offset from axis
253 ....Rim connected to hub by spokes
254 ....With escutcheon
255 ...Spout (10)
256 ....Simulative
257 ....With control for diverter or drain
258 ...Float or check
259 .Fitting (11)
260 ..Cap, plug, vent or screen (12)
261 ...Drain guard or strainer (13)
262 ..Coupling or joint
263 ...Elbow or with flow direction change
264 ....Adjustable (e.g., swivel, etc.)
265 ...Clamp or bolt engagement
266 ..Pipe, tubing or hose
267 ..Gutter
268 ..Trap
269 ..Gasket or packing
270 SANITARY FIXTURE OR HOUSING THEREFOR
271 .Combined (14)
272 ..Sink and stove or refrigerator
273 ..Sink, water closet and bathing unit
274 ..Sink and water closet or urinal
275 ..Bathtub and shower enclosure
276 .Sitz bath (15)
277 .Bathtub (16)
278 ..Infant type
279 ..With door or provision for external storage
280 ..Symmetrical or two axes (17)
281 ..Bilaterally symmetrical (17)
282 ...Footed
283 .Shower or shower receptor (18)
284 .Sink
285 ..Simulative, or with radiating striations
286 ..With cabinet or with provision for storage
287 ..With drainboard (i.e., adjacent recessed inclined surface)
288 ..Corner type
289 ..Shampoo type (e.g., with depression on rim for neck, etc.)
290 ..Plural
291 ..With integral spout or hooded overflow
292 ..Unitary singular support column
293 ..Symmetrical on two axes in plan (17)
294 ..Bilaterally symmetrical in plan
295 .Water closet, bidet or bowl therefor
296 ..Infant training type
297 ...Simulative
298 ..Simulative
299 ..Self-contained (i.e., chemical or portable type)
300 ..Wall mounted
301 ..With water tank (19)
302 .Urinal (20))
303 .Element or attachment (21)
304 ..Bathtub or shower
305 ...Surround, door or panel
306 ....Front
307 ...Splash shield
308 ..Sink (22)
309 ..Water closet or urinal
310 ...Deflector (23)
311 ...Seat, or bowl cover (24)
312 ....Simulative
313 ...Tank or tank cover
314 HEATING OR COOLING
315 .Sauna or steam bath type
316 .Liquid immersion type, e.g., aquarium, swimming pool, etc.
(25)
317 .Mobile space heater, e.g., wheeled blower type, etc.
318 .Domestic water heater or boiler
319 ..Boiler
320 ..With door or access panel
321 ..With discharge valve or tap
322 ..Element
323 ...Heat exchange unit, e.g., coil, etc.
324 .Vehicle heating or cooling
325 ..Air conditioning
326 ..Defroster
327 ..With adjustable louver or door
328 .Combined heating and cooling or with diverse element
329 .Furnace
330 .Radiator, e.g., spaced enclosed heat exchangers
331 ..Plant life or scroll type ornamentation
332 .Portable
333 ..Air conditioner
334 ..Animal or agricultural heater
335 ..Heating element protected by grille, grid,etc.
336 ...Circular or cylindrical housing
337 ...Pedestal or pivoting head mount
338 ...Liquid fuel type, e.g., kerosene, etc.
339 ...Gas fired type
340 ...Quartz type
341 ..Element
342 .Stabile space heater
343 ..Fireplace or solid fuel heating stove (26)
344 ...Fireplace insert
345 ...Masonry or tile-like surround, e.g., architectural type
fireplace
346 ...Ornate cast iron type (27)
347 ....Element therefor, e.g., stove plate, etc.
348 ...Circular horizontal cross section
349 ...Simulative
350 ...Symmetrical front
351 .Air conditioner (28)
352 ..Circular housing
353 ..Window mount type
354 ..Element, e.g., front panel, etc.
355 .Air Treatment
356 ..Humidifier
357 ...Wall or furnace mount
358 ...Elementt
359 ..Dehumidifier
360 ..Vaporizer
361 ...Wall mount
362 ...Circular container
363 ...Element
364 ..Air cleaner
365 ...Filter
366 ..Deodorizer or ozonizer
367 ...Simulative
368 ...With distinct hanger or suction cup
369 ...Activated by moveable cover or by piercing
370 ..Fan or ventilator
371 ...Exhaust type
372 ....Range or oven
373 ....Roof or chimney
374 .....Chimney
375 .....Wind rotated, e.g., turbine type, etc.
376 .....Circular hood
377 ...Blade unit rotates on vertical axis
378 ...Floor type on vertically elongated stand
379 ...With exposed blade
380 ...Plural impeller units, e.g., side by side, etc.
381 ...Wire protective grille
382 ....Circular grille
383 ...Blower
384 ...Bellows
385 ..Wall or ceiling mount (25)
386 .Element or attachment, not elsewhere specified
387 ..Flow director (29)
388 ...Register or diffuser
389 ....Baseboard type
390 ....Circular
391 ....Arched or curved top
392 ....Adjustable louver or damper
393 ...Vent, ductwork, or element thereof
394 ....Stovepipe
395 ..Radiator cover or cabinet
396 ..Stoker
397 ..Grate
398 ...Fireplace type (30)
399 ....Hollow tube circulator with blower unit
400 ....Perforated or expanded metal
401 ....Enclosed four sides
402 ...Stove or furnace type
403 ..Fireplace element not elsewhere specified
404 ...Mantle or frame for opening
405 ...Lining or enclosure for opening (31)
406 ....Screen
407 ...Andiron or fire dog
408 ....Simulative
409 ...Artificial log burner element
410 ..Coal scuttle or wood holder
411 ..Fan element
412 ...Fan quard
413 ...Fan or ventilator blade
414 ....With circumferential band
415 ..Burner or heater coil
416 ...Oil typee
417 ...Electric
418 ...Element
419 ....Radiant
420 ..Ash pan or sifter
421 ..Valve or control
422 ..Fire brick
499 MISCELLANEOUS