US PATENT SUBCLASS 138 / 151
.~ With longitudinal seam

Current as of: June, 1999
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138 /   HD   PIPES AND TUBULAR CONDUITS

140  DF  DISTINCT LAYERS {8}
151.~ With longitudinal seam {1}
152  DF  .~.~> Material of one layer passing through seam

DEFINITION

Classification: 138/151

(under subclass 140) Device wherein at least one layer has a longitudinally extending seam therein.

SEE OR SEARCH THIS CLASS, SUBCLASS:

128, for longitudinally seamed flexible pipe.