Growing community of inventors

Richmond, VA, United States of America

William T Callaham

Average Co-Inventor Count = 5.09

ph-index = 2

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 = 30

William T CallahamWalter Allen Nichols (1 patent)William T CallahamReginald W Newsome (1 patent)William T CallahamWarren E Claflin (1 patent)William T CallahamRichard E Thatcher (1 patent)William T CallahamRichard A Thesing (1 patent)William T CallahamJohn F Sherwood (1 patent)William T CallahamLouis R Turano (1 patent)William T CallahamPaul N Gauvin (1 patent)William T CallahamAlexander S Gergely (1 patent)William T CallahamWilliam T Callaham (2 patents)Walter Allen NicholsWalter Allen Nichols (69 patents)Reginald W NewsomeReginald W Newsome (33 patents)Warren E ClaflinWarren E Claflin (12 patents)Richard E ThatcherRichard E Thatcher (9 patents)Richard A ThesingRichard A Thesing (8 patents)John F SherwoodJohn F Sherwood (3 patents)Louis R TuranoLouis R Turano (3 patents)Paul N GauvinPaul N Gauvin (2 patents)Alexander S GergelyAlexander S Gergely (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Philip Morris Inc. (2 from 759 patents)


2 patents:

1. 5178166 - Filter cigarette

2. 4696312 - Method and apparatus for producing cigarette filler

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as of
1/2/2026
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