US PATENT SUBCLASS 29 / 890.147
.~.~ Return connector device making

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

592  DF  METHOD OF MECHANICAL MANUFACTURE {54}
890.14  DF  .~ Gas and water specific plumbing component making {9}
890.147.~.~ Return connector device making

DEFINITION

Classification: 29/890.147

Return connector device making:

(under subclass 890.14) Process wherein the manufactured article forms at least part of an enclosed passageway or channel for conveying gas or water back to its starting point or previous location.