US PATENT SUBCLASS 237 / 46
VENTILATING
Current as of: June, 1999
Click HD for Main Headings
Click for All Classes
DEFINITION
Classification: 237/46
(under the class definition) Heating systems for rooms, chambers, or other enclosures provided with means for removing air from the rooms.
(1) Note. Apparatus for only admitting fresh air and heating it are not included.
SEE OR SEARCH CLASS
126, Stoves and Furnaces,
84, for combined stove and ventilator, and subclass 293 for combined damper and ventilator.
165, Heat Exchange,
248+, for the automatic control of ventilation in a heating and cooling system; subclass 54 for heat exchanger installed in a wall traversing passage; and subclass 59 for a heating and cooling system with a ventilation feature. 454, Ventilating, for specific ventilating apparatus combined with an undefined heater.
