US PATENT SUBCLASS 138 / 132
.~.~ Embedded

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

118  DF  FLEXIBLE {8}
129  DF  .~ Spirally wound material {4}
132.~.~ Embedded {1}
133  DF  .~.~.~> Metal

DEFINITION

Classification: 138/132

(under subclass 129) Device which is embedded in the pipe wall or enclosed between two or more layers of the pipe.