Growing community of inventors

Ludwigsburg, Germany

Friedhelm Zehner

Average Co-Inventor Count = 3.00

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 = 11

Friedhelm Zehner ↔ Berthold Pfuhl (1 patent)Friedhelm Zehner ↔ Joachim Zumbraegel (1 patent)Friedhelm ZehnerFriedhelm Zehner (1 patent)Berthold PfuhlBerthold Pfuhl (11 patents)Joachim ZumbraegelJoachim Zumbraegel (4 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Robert Boschgmbh (1 from 29,302 patents)


1 patent:

1. 5617895 - Hydraulic control valve

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1/13/2026
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