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Liquid heaters and vaporizers

Subclass of: 122 - Liquid heaters and vaporizers

Deeper subclasses:

122001000 - PLANTS (12)
122004000 - MISCELLANEOUS (6)
122005000 - GAS-PRODUCER (1)
122006000 - INDUSTRIAL (9)
122011000 - ROTARY (2)
122130010 - STAND BOILER (E.G., WATER HEATER, ETC.) (55)
122020000 - SUBSIDIARY (3)
122000000 - INDIRECTLY HEATED (4)
122310100 - INDIRECTLY HEATED SEPARATE INJECTED FLUID (1)
122440100 - FIRE TUBE (5)
122135100 - FLUE (3)
122209100 - SECTIONAL (1)
122235110 - WATER TUBE (7)
122367100 - HEAT TRANSMITTER (5)
122026000 - FRICTION GENERATOR (1)
122379000 - CLEANING (9)
122406100 - CIRCULATION (2)
122412000 - FEED HEATERS (1)
122448100 - AUTOMATIC CONTROL OF FLUID FUEL AND WATER (1)
122451000 - FEEDERS (2)
122459000 - STEAM TREATMENT (1)
122504000 - SAFETY DEVICES (2)
122510000 - SUPPORTS (3)
122511000 - TUBES AND CONNECTIONS (1)