Tob. Reporter, 1986, 113-6, p. 57, ISSN.0361-5693 Porous filter rod uses capillary passageway REYNOLDS M.L.; FRANK D.M.; RIEHL T.F. US Patent 4,580,584. Brown & Williamson....
Tob. Reporter, 1986, 113-11, p. 62, ISSN.0361-5693 Cigarette filter rod circumscribed by wrapper REYNOLDS M.L.; FRANK D.M.; RIEHL T.F. US Patent 4,611,607. Brown & Williamson....