US PATENT SUBCLASS 237 / 56
WATER
Current as of: June, 1999
Click HD for Main Headings
Click for All Classes
DEFINITION
Classification: 237/56
(under the class definition) Heating system in which the room or building is heated by the circulation of water or some other liquid.
SEE OR SEARCH THIS CLASS, SUBCLASS:
8, for automatic control.
12.4, for car heaters.
15, for brooder heaters.
17, 18, for combined radiator and boiler.
34+, for vehicle heaters.
