US PATENT SUBCLASS 285 / 230
.~ Concrete, clay, or masonry pipe

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

223  DF  FLEXIBLE JOINT, RIGID MEMBERS {6}
230.~ Concrete, clay, or masonry pipe

DEFINITION

Classification: 285/230

(under subclass 223) Devices specifically adapted to clay, concrete or masonry pipe.

SEE OR SEARCH THIS CLASS, SUBCLASS:

231, for other socketed packing type joints.