Growing community of inventors

Vancouver, WA, United States of America

John Kempke

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

John KempkeMark F Williams (2 patents)John KempkeRichard O Williams (2 patents)John KempkeJohn Kempke (2 patents)Mark F WilliamsMark F Williams (57 patents)Richard O WilliamsRichard O Williams (6 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Alpha-Tec Systems, Inc. (2 from 7 patents)


2 patents:

1. 10451528 - Collection, filtration and concentration apparatus for biological samples

2. 10299767 - Sample collection apparatus

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1/13/2026
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