Growing community of inventors

Bunker Hill, IL, United States of America

Christopher Keith Duncan

Average Co-Inventor Count = 2.00

ph-index = 1

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 = 2

Christopher Keith DuncanAnthony Frank DeJohn (1 patent)Christopher Keith DuncanChristopher Keith Duncan (1 patent)Anthony Frank DeJohnAnthony Frank DeJohn (2 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Piston Tank Corporation (1 from 1 patent)


1 patent:

1. 10563763 - Tank piston with improved seal and cover

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as of
12/21/2025
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