Tob. Reporter, 1987, 114-10, p. 53, ISSN.0361-5693
Filter cigarette allowing levels of flavorants
KALLIANOS A.G.; SPRINKEL F.M. Jr.; DECKER P.
U.S. patent 4,677,995 assigned to Philip Morris. A filter cigarette is provided in which the smoker can select varying levels of one or more flavorants to be added to the smoke stream. A rotatable filter segment having several smoke flow paths, each...