Growing community of inventors

Cary, IL, United States of America

Keith Chappell

Average Co-Inventor Count = 3.00

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 = 16

Keith ChappellMichael Stephen Donovan (1 patent)Keith ChappellJason M Logsdon (1 patent)Keith ChappellKeith Chappell (1 patent)Michael Stephen DonovanMichael Stephen Donovan (12 patents)Jason M LogsdonJason M Logsdon (2 patents)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Amcol International Corporation (1 from 167 patents)


1 patent:

1. 8206817 - Window and door flashing, roofing underlayment, protection course, root block and sound control underlayment material products

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as of
12/6/2025
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