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Degradable slitted cigarette filter
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Patent number 7,435,208
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Issue date Oct 14, 2008
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Philip Morris USA Inc.
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Martin T. Garthaffner
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A24 - TOBACCO CIGARS CIGARETTES SMOKERS' REQUISITES
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Smoking article mouthpieces
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Patent number 4,911,684
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Issue date Mar 27, 1990
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British American Tobacco Company Limited
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Martin G. Duke
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A24 - TOBACCO CIGARS CIGARETTES SMOKERS' REQUISITES
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Smoking article mouthpieces
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Patent number 4,677,996
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Issue date Jul 7, 1987
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Brown & Williamson Tobacco Corporation
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John A. Luke
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A24 - TOBACCO CIGARS CIGARETTES SMOKERS' REQUISITES
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Tobacco-smoke filters
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Patent number 4,578,053
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Issue date Mar 25, 1986
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British American Tobacco Company Limited
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John A. Luke
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A24 - TOBACCO CIGARS CIGARETTES SMOKERS' REQUISITES
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Filters
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Patent number 4,388,934
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Issue date Jun 21, 1983
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British American Tobacco Company Limited
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John A. Luke
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A24 - TOBACCO CIGARS CIGARETTES SMOKERS' REQUISITES
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Production of tobacco-smoke filters
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Patent number 4,292,032
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Issue date Sep 29, 1981
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British American Tobacco Company Limited
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John A. Luke
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A24 - TOBACCO CIGARS CIGARETTES SMOKERS' REQUISITES
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Aeration groove filter
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Patent number 4,219,030
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Issue date Aug 26, 1980
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Liggett Group Inc.
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Floyd V. Hall
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A24 - TOBACCO CIGARS CIGARETTES SMOKERS' REQUISITES
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Production of tobacco-smoke filters
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Patent number 4,149,546
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Issue date Apr 17, 1979
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British American Tobacco Company Limited
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John A. Luke
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A24 - TOBACCO CIGARS CIGARETTES SMOKERS' REQUISITES