US PATENT SUBCLASS 285 / 221
.~.~ Necked plate

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}
221.~.~ Necked plate

DEFINITION

Classification: 285/221

(under subclass 219) Subject matter in which a transverse annular projection integral with the plate is threaded for connection with a pipe end.