Growing community of inventors

Washington, United Kingdom

John Charlton

Average Co-Inventor Count = 2.62

ph-index = 5

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 71

John CharltonPaul Francis Clarke (5 patents)John CharltonPaul Richard Clarke (2 patents)John CharltonIchiro Atobe (2 patents)John CharltonErnest B Hayes (1 patent)John CharltonMasanori Koborinai (1 patent)John CharltonAtsushi Tokida (1 patent)John CharltonRichard Karl Shepherd (1 patent)John CharltonJohn Charlton (7 patents)Paul Francis ClarkePaul Francis Clarke (6 patents)Paul Richard ClarkePaul Richard Clarke (9 patents)Ichiro AtobeIchiro Atobe (3 patents)Ernest B HayesErnest B Hayes (3 patents)Masanori KoborinaiMasanori Koborinai (2 patents)Atsushi TokidaAtsushi Tokida (1 patent)Richard Karl ShepherdRichard Karl Shepherd (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Cigarette Components Limited (5 from 7 patents)

2. Other (2 from 832,718 patents)


7 patents:

1. 6718989 - Filter for a cigarette and a filter-tipped cigarette

2. 6422244 - Filter for a cigarette and filter cigarette

3. 6302114 - Tobacco smoke filter

4. 6080457 - Particulate sorbent smoke filter

5. 5787902 - Concentric core filter

6. 5662126 - Smoke filter containing particulate smoke modifying additive

7. 4904308 - Adjustable smoker's mouthpiece

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as of
12/13/2025
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