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David B. Spruill
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Richmond, VA, US
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last 30 patents
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Patent Grant
Device for controlling relative humidity within a substantially sea...
Patent number
5,037,459
Issue date
Aug 6, 1991
Philip Morris Management Corp.
David B. Spruill
A24 - TOBACCO CIGARS CIGARETTES SMOKERS' REQUISITES
Information
Patent Grant
Device for controlling relative humidity within a substantially sea...
Patent number
5,035,731
Issue date
Jul 30, 1991
Philip Morris Management Corp.
David B. Spruill
A24 - TOBACCO CIGARS CIGARETTES SMOKERS' REQUISITES
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Patent Grant
Filter cigarette
Patent number
4,687,008
Issue date
Aug 18, 1987
Philip Morris Incorporated
Willie G. Houck
A24 - TOBACCO CIGARS CIGARETTES SMOKERS' REQUISITES