Growing community of inventors

West Chester, PA, United States of America

David Francis

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

David FrancisJack M Champaigne (1 patent)David FrancisDavid Francis (1 patent)Jack M ChampaigneJack M Champaigne (25 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Metal Improvement Company, LLC (1 from 28 patents)

2. Electronics, Inc. (1 from 22 patents)


1 patent:

1. 8479568 - Apparatus for measuring variations in flatness

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