US PATENT SUBCLASS 493 / 50
.~ Filter of fibrous material

Current as of: June, 1999
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493 /   HD   MANUFACTURING CONTAINER OR TUBE FROM PAPER; OR OTHER MANUFACTURING FROM A SHEET OR WEB

39  DF  CIGARETTE FILTER MAKING {5}
50.~ Filter of fibrous material

DEFINITION

Classification: 493/50

Filter of fibrous material:

(under subclass 39) Method or apparatus comprising forming a filter from material having generally elongated, textilelike strands.