Apparatus for the exchange of substances and heat for use in the production of steam, for use in cooking and for use in refrigeration; Barbecue smoker accessories, namely, convection plates; Barbecue smokers; Butane torches for cooking; Devices for generating smoke for signaling; Head torches; Heating apparatus for solid, liquid or gaseous fuels; Personal air filtering units for filtering tobacco smoke exhaled directly into the unit; Smoke generating machines for creating special theatrical e...