US PATENT SUBCLASS 138 / 112
.~ With spacer and encircling element

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

111  DF  PLURAL DUCT {4}
112.~ With spacer and encircling element

DEFINITION

Classification: 138/112

(under subclass 111) Device supported by spacer elements and having a duct encircling member which is not fully coextensive with said duct.