Growing community of inventors

Kettering, OH, United States of America

Jeffrey William Hemmelgarn

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 = 2

Jeffrey William HemmelgarnJohn W Fraser (1 patent)Jeffrey William HemmelgarnEric Serenius (1 patent)Jeffrey William HemmelgarnJeffrey William Hemmelgarn (1 patent)John W FraserJohn W Fraser (12 patents)Eric SereniusEric Serenius (4 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Ohio Gravure Technologies, Inc. (1 from 2 patents)


1 patent:

1. 8863661 - System and method for layer-to-layer compensation and error correction

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as of
12/16/2025
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