US PATENT SUBCLASS 29 / 890.05
.~.~.~.~ Made from unitary workpiece, i.e., no assembly

Current as of: June, 1999
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29 /   HD   METAL WORKING

592  DF  METHOD OF MECHANICAL MANUFACTURE {54}
890.03  DF  .~ Heat exchanger or boiler making {15}
890.045  DF  .~.~ Tube with heat transfer means {1}
890.046  DF  .~.~.~ Finned tube {4}
890.05.~.~.~.~ Made from unitary workpiece, i.e., no assembly

DEFINITION

Classification: 29/890.05

Made from unitary workpiece, i.e., no assembly:

(under subclass 890.046) Process wherein the finned tube is manufactured from a single preform member or bonded monolithic structure.