Growing community of inventors

Caledonia, MI, United States of America

John Kooiker

Average Co-Inventor Count = 1.50

ph-index = 3

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 = 123

John KooikerCharles J Steffens (1 patent)John KooikerChuck J Steffens (1 patent)John KooikerJohn Kooiker (3 patents)Charles J SteffensCharles J Steffens (18 patents)Chuck J SteffensChuck J Steffens (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Steffens Enterprises, Inc. (3 from 21 patents)


3 patents:

1. 5653491 - Folding cargo bay cover for pickup trucks

2. 4946217 - Pickup box covers

3. 4844531 - Folding cover for pickup box

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as of
12/11/2025
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