Growing community of inventors

Grand Rapids, MI, United States of America

Chuck J Steffens

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 = 44

Chuck J SteffensJohn Kooiker (1 patent)Chuck J SteffensChuck J Steffens (1 patent)John KooikerJohn Kooiker (3 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Steffens Enterprises, Inc. (1 from 21 patents)


1 patent:

1. 5653491 - Folding cargo bay cover for pickup trucks

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as of
12/31/2025
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