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
that is, no embedded spaces, class and subclass seperated by a dash, and any
subclass letters capitalized. Currently Design Patent titles (those in the
classes of the form Dxx.yy) are not retreivable.
Class Number: 237
Class Title: HEATING SYSTEMS
Subclass Subclass
Number Title
1 R MISCELLANEOUS
1 SL .Special liquid
2 R AUTOMATIC CONTROL
3 .Brooder and incubator
4 ..Water
5 .Car
6 ..Steam
7 .Combined radiator and boiler
8 R .Water
8 A ..Automatic heating systems (water) with controls
8 B ..Heating systems with high temperature boiling liquids
8 C ..With boiler by-pass valve control
8 D ..Compact heating systems with controls
9 R .Steam
10 ..Gas displaced
9 A ..Automotive systems
9 B ..With direct contact between products of combustion and
the liquid to be vaporized
11 .Compressed air
12 .Processes
2 A .Automatic heating systems with controls
2 B .Heat source is a reverse cycle refrigerating system or
heat pump
12.1 HEAT AND POWER PLANTS
12.2 .Fire engine
12.3 R .Vehicle
12.3 A ..The heating is effected by circulated air
12.3 B ..The heating is effected by circulated hot water
12.3 C ..The heating system includes a combustion type heater
12.4 .Car
12.5 ..Smoke
12.6 ..Air
12.7 ...Radiator
12.8 ..Steam
13 PLANTS
14 BROODER AND INCUBATOR
15 .Water
16 COMBINED RADIATOR AND BOILER
17 .Fluid fuel
18 .Solid fuel
19 COMBINED WITH WATER HEATER
28 VEHICLE
29 .Stove
30 ..Air casing
31 ..Depending
32 .Fluid fuel
33 ..Radiator
34 .Water
35 ..Car boiler
36 ...Fluid fuel
37 ...Train steam
38 ....Injectedd
39 ..Train steam
40 .Steam
41 ..Car boiler
42 ...Train steam
43 .Heated floor
44 .Heat accumulator
45 .Encased radiator
69 HEATED FLOOR
46 VENTILATING
47 .Stove
48 .Furnace
49 .Enclosed radiator
50 AIR
52 .Stove
53 .Furnace
54 .Upper-room drum
55 .Flue heated
56 WATER
57 .Fluid fuel
58 .Steam
59 .Circulation
60 ..Geyser boiler
61 ..Auxiliary boiler
62 ..Boiler loop
63 ..Pump
64 ...Steam displacing
65 .Pressure regulator
66 .Expansion tanks
67 STEAM
68 .Air discharge
70 HEAT RADIATORS
71 .Water, steam
72 ..Injected
73 .Steam
74 ..Circuit
75 ..Heat accumulator
76 .Ceramic
77 .Foot warmer
78 R .Air moistener
78 A ..Casing
78 B ..Radiator wick
78 C ..From radiator valve
79 .Shields
80 ANTIFREEZING DEVICES
81 PROCESSES
* ******************************
* DIGEST
* ******************************
DIG 1 Inert gas