US PATENT SUBCLASS 138 / 167
.~ With diverse locking means

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

156  DF  LONGITUDINALLY SEAMED {8}
167.~ With diverse locking means

DEFINITION

Classification: 138/167

(under subclass 156) Device having different structural means holding together adjacent longitudinal edges of the seamed pipe.