Growing community of inventors

Chicago, IL, United States of America

Thomas K Johnson, Jr

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 = 0

Thomas K Johnson, JrDavid J Norberg (2 patents)Thomas K Johnson, JrDaniel Yocius (2 patents)Thomas K Johnson, JrThomas K Johnson, Jr (2 patents)David J NorbergDavid J Norberg (6 patents)Daniel YociusDaniel Yocius (3 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Stepan Company (2 from 221 patents)


2 patents:

1. 11686575 - Hardness and flatness tester

2. 11009342 - Hardness and flatness tester

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1/3/2026
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