US PATENT SUBCLASS 285 / 133.6
.~.~ For thin-walled material (e.g., sheet-metal)

Current as of: June, 1999
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285 /   HD   PIPE JOINTS OR COUPLINGS

125.1  DF  FOR BRANCHED PATH {8}
133.11  DF  .~ T-type {5}
133.6.~.~ For thin-walled material (e.g., sheet-metal)

DEFINITION

Classification: 285/133.6

For thin-walled material (e.g., sheet metal):

(under subclass 132.1) Subject matter wherein the cross-sectional dimension from the inside diameter to the outside diameter of the cylinder forming the line is very small (e.g., HVAC ductwork, etc.).