(under subclass 592) Process for manufacturing a gas and water device which is (1) useful for deadening the noise produced by escaping gas or vapor, (2) a duct through which spent gas leaves an engine or gas turbine or (3) a branch duct arrangement which connects valve parts of a multicylinder internal combustion engine to a carburetor or to an exhaust gas handling system.
(1) Note. Prior to the establishment of this subclass (890.08), this subject matter was indented under "Gas and Water Device Making" (old 29/157+). Other subclasses under Class 29, subclasses 592+ have not been screened for this subject matter.
SEE OR SEARCH CLASS
138, Pipes and Tubular Conduits, for a tubular member for transmitting gas, generally.
