US PATENT SUBCLASS 29 / 888.072
.~.~.~ Including casting or molding

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

592  DF  METHOD OF MECHANICAL MANUFACTURE {54}
888  DF  .~ Prime mover or fluid pump making {12}
888.07  DF  .~.~ Piston ring or piston packing making {6}
888.072.~.~.~ Including casting or molding

DEFINITION

Classification: 29/888.072

Including casting or molding:

(under subclass 888.07) Process wherein the manufactured ring is produced by shaping a liquid or plastic substance into a fixed shape utilizing a forming surface or mold.