Growing community of inventors

Scottsdale, AZ, United States of America

Charles B Duff

Average Co-Inventor Count = 1.33

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 = 36

Charles B DuffDaniel M Stout (1 patent)Charles B DuffCharles B Duff (2 patents)Daniel M StoutDaniel M Stout (6 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Farnam Companies, Inc. (1 from 30 patents)

2. Whitmire Research Laboratories, Inc. (1 from 6 patents)


2 patents:

1. 4411093 - Insect lure

2. D269897 - Fly trap

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as of
12/15/2025
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