US PATENT SUBCLASS 138 / 120
.~ Joined sections

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

118  DF  FLEXIBLE {8}
120.~ Joined sections

DEFINITION

Classification: 138/120

(under subclass 118) Device wherein the tube wall is made up

of jointed, short and tubular, relatively movable sections.

SEE OR SEARCH CLASS

59, Chain, Staple, and Horseshoe Making,

78.1, for a pipe the sections of which constitute chain links.

285, Pipe Joints or Couplings,

144.1+, for movable joints.