US PATENT SUBCLASS 131 / 346
.~ With indicator or inspection means

Current as of: June, 1999
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131 /   HD   TOBACCO

331  DF  SMOKE SEPARATOR OR TREATER {9}
346.~ With indicator or inspection means

DEFINITION

Classification: 131/346

With indicator or inspection means:

(under subclass 331) Product or process including means to indicate to the user that deleterious material has been separated from the smoke screen, or means to inspect the deleterious material that has been separated.