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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Class Number: 169
Class Title: FIRE EXTINGUISHERS
Subclass Subclass
Number Title
43 PROCESSES
44 .With mixing of extinguishing compounds
45 .Of preventing fire
46 .Of extinguishing fire
47 ..By projecting extinguishant directly onto seat of fire
48 APPARATUS WHICH ISOLATES FLAMES FROM NON-BURNING AREA
49 .With means to isolate fire from atmosphere and extinguish
50 ..Acted upon by operator in use
51 MOUNT, CABINET OR GUARD
52 .Movable relative to fire
53 ..On air-borne vehicle
24 ..Fire engines
25 ..Water towers
54 SPECIAL APPLICATIONS
55 .For railway car heaters
56 .Condition responsive control
57 ..Having fusible plug, support, or holder
58 ..Having frangible extinguishant holder
59 ..Fusible cable
60 ..Sensor, control and actuator
61 ...Electrical control
62 .For vehicles
63 .For motion picture apparatus
64 .For mine
65 .For cooking installation
66 .For storage tank
67 ..Extinguisher having transport or erection means
68 ..With specific extinguishant applying means
69 .For oil or gas well
70 .With specific extinguishant applying means, or means for
providing access to fire
5 FLUID SYSTEMS
6 .Chemical pressure generating
7 ..Automatic
8 ...Pressure controlled
9 .Gas-pressure discharge
10 .Gravity
11 .Gas
12 ..Combustion products
13 .Pump supply
14 .Plural source, mixing in transit
15 ..Stream impregnating
16 .Distributing systems
17 ..Dry pipe
18 ..Hand controls
19 AUTOMATIC VALVES
20 .Pressure controlled
21 ..Lever system
22 ..Differential area
23 ALARMS
26 AUTOMATIC RECEPTACLES
27 .Chemical mixingg
28 .Explosive
29 .Mechanical discharge
30 PORTABLE VESSELS
71 .Gas pressure
72 ..With means facilitating total discharge
73 ...By collapsing chamber holding agent
74 ..With particular outlet structure
75 ..With means preventing accidental discharge, relieving
pressure, or indicating condition within vessel
76 ..With means permitting repeated discharge
77 ..Power extinguishant
78 ..Produced by chemical mixing
79 ...Upon inversion of internal container
80 ...Upon inversion of vessel
81 ....Breaks reactant container
82 ....Reactant container closure released by gravity
83 ...Upon breaking internal container
84 ..Produced by combustion
85 ..Pressurizing agent stored apart from agent
86 ...With means to prevent freezing of expanding gas
87 ...Vessel inverted to release gas
88 ...Lever or trigger operated to release gas
89 ..Discharge head
33 .Piston discharge
34 .Buckets
35 .Tubes
36 .Grenades
37 SPRINKLER HEADS
90 .Shut off valve
38 .Collapsible strut
39 ..Compound
40 .Lever
41 .Direct support
42 FUSIBLE CONNECTIONS
91 MISCELLANEOUS: E.G., BLOWERS
* ******************************
* DIGESTS
* ******************************
DIG 1 Floats
DIG 2 Ablative fluids
DIG 3 Trip mechanisms