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Manitowoc, WI, United States of America

David F Evans

Average Co-Inventor Count = 2.40

ph-index = 2

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 = 41

David F EvansLeonard J Yindra (2 patents)David F EvansJoseph R Klug (1 patent)David F EvansDavid F Evans (2 patents)Leonard J YindraLeonard J Yindra (10 patents)Joseph R KlugJoseph R Klug (2 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. American Hospital Supply Corporation (2 from 433 patents)


2 patents:

1. 4130069 - Vertically-adjustable two-post drafting table

2. 4108086 - Drafting board and support structure therefor

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as of
12/19/2025
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