Growing community of inventors

Caledonia, MI, United States of America

Stephen W Johnston

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 = 0

Stephen W JohnstonSean D McKendry (1 patent)Stephen W JohnstonStephen W Johnston (1 patent)Sean D McKendrySean D McKendry (1 patent)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Weiss Technik North America, Inc. (1 from 3 patents)


1 patent:

1. 10935486 - Environmental test chamber

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12/21/2025
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