Ned A. Sigmon

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Durham, NC, US

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Patents Grantslast 30 patents

Information Patent Grant
Method for making a hollow filter rod
- Patent number 4,179,323
- Issue date Dec 18, 1979
- Liggett Group Inc.
- Ned A. Sigmon
- A24 - TOBACCO CIGARS CIGARETTES SMOKERS' REQUISITES
Information Patent Grant
Apparatus for measuring smoke dilution in a vented-filter cigarette
- Patent number 4,171,635
- Issue date Oct 23, 1979
- Liggett Group Inc.
- Donald A. Calleson
- A24 - TOBACCO CIGARS CIGARETTES SMOKERS' REQUISITES
Information Patent Grant
Method and apparatus for making a hollow filter and a filter rod
- Patent number 4,024,012
- Issue date May 17, 1977
- Liggett & Myers Incorporated
- Ned A. Sigmon
- A24 - TOBACCO CIGARS CIGARETTES SMOKERS' REQUISITES