US PATENT SUBCLASS 285 / 220
.~.~ With packing

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

189  DF  END TO SIDE OR PLATE (E.G., REINFORCEMENT) {11}
219  DF  .~ Screw {2}
220.~.~ With packing

DEFINITION

Classification: 285/220

(under subclass 219) Subject matter including sealing material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

148.6+, for leak-gland type couplings.