US PATENT SUBCLASS 138 / 154
SPIRALLY SEAMED

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

154SPIRALLY SEAMED

DEFINITION

Classification: 138/154

(under the class definition) Device having a spirally extending seam.

SEE OR SEARCH THIS CLASS, SUBCLASS:

129+, for flexible pipe having a spiral seam.

144, for a distinct layer pipe wherein at least one layer is spirally wound.

150, for a distinct layer wherein at least one layer has a spiral seam.

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428, Stock Material or Miscellaneous Articles,

592, for metallic stock which is helical or has a helical component.