US PATENT SUBCLASS 131 / 57.5
.~.~ Drum and concave surfaces

Current as of: June, 1999
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131 /   HD   TOBACCO

280  DF  CIGAR OR CIGARETTE MAKING {14}
27.1  DF  .~ Including cooperating surfaces to induce rolling {6}
57.5.~.~ Drum and concave surfaces

DEFINITION

Classification: 131/57.5

Drum and concave surface:

(under subclass 27.1) Subject matter wherein the coactive elements include a cylinder cooperating with an associated inwardly curving, i.e., concave, element.