Growing community of inventors

Forest Ranch, CA, United States of America

Donald John Evans

Average Co-Inventor Count = 2.67

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 = 42

Donald John EvansDavid R Kemp (1 patent)Donald John EvansMark J Hastings (1 patent)Donald John EvansAlbert Michael Harder (1 patent)Donald John EvansHans-Peter Feucht (1 patent)Donald John EvansDonald John Evans (2 patents)David R KempDavid R Kemp (9 patents)Mark J HastingsMark J Hastings (2 patents)Albert Michael HarderAlbert Michael Harder (2 patents)Hans-Peter FeuchtHans-Peter Feucht (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Other (1 from 832,966 patents)

2. Venturi Medical Systems (1 from 2 patents)


2 patents:

1. 7054677 - Venturi ECG electrode system

2. 5161681 - Safety container for hypodermic syringes

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as of
1/20/2026
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