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Palmerton, PA, United States of America

Erik Zetterstrand

Average Co-Inventor Count = 3.00

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

Erik ZetterstrandRobert J Elbich (3 patents)Erik ZetterstrandSteven D Welch (3 patents)Erik ZetterstrandErik Zetterstrand (3 patents)Robert J ElbichRobert J Elbich (5 patents)Steven D WelchSteven D Welch (3 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Parker-hannifin Corporation (1 from 1,660 patents)

2. Parker Intangibles LLC (1 from 18 patents)

3. Exigo Manufacturing, Inc. (1 from 1 patent)

4. Mitos Technologies, Inc. (1 from 1 patent)


3 patents:

1. 7686027 - Multi-port free flow valve and element

2. 7383853 - Multi-port free flow valve and element

3. 6976664 - Free flow valve and element

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as of
12/9/2025
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