Growing community of inventors

Columbus, IN, United States of America

Michael David Johnson

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 = 1

Michael David JohnsonJames Quackenbush (1 patent)Michael David JohnsonMichael David Johnson (1 patent)James QuackenbushJames Quackenbush (2 patents)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Emcon Technologies LLC (1 from 39 patents)


1 patent:

1. 7431345 - Serviceable exhaust joint connection

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as of
12/15/2025
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