US PATENT SUBCLASS 138 / 152
.~.~ Material of one layer passing through seam

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

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

DEFINITION

Classification: 138/152

(under subclass 151) Device wherein the edges of at least one layer are spaced from each other and another layer has a part thereof extending into said space.