(under subclass 271.1) Devices for applying the products of combustion of fluid fuel, hot air heated by fluid fuel, steam in combination with either the products of combustion or hot air.
SEE OR SEARCH CLASS
431, Combustion,
344, for a flame holder-fuel tank assembly not particularly adapted for heating a surface (e.g., gasoline blow torch, etc.) and subclass 345 for a flame holder having an attached handle.