Growing community of inventors

Waterford, MI, United States of America

James E Ludwig

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 = 2

James E LudwigDavid L Hall (1 patent)James E LudwigJames E Ludwig (1 patent)David L HallDavid L Hall (3 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Air Products and Controls, Inc. (1 from 3 patents)


1 patent:

1. 7204522 - Duct detector housing

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as of
12/19/2025
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