Growing community of inventors

Pulheim, Germany

Siegfried Dzwonnek

Average Co-Inventor Count = 2.40

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 = 2

Siegfried DzwonnekJorg Hagemann (1 patent)Siegfried DzwonnekRalf Weimann (1 patent)Siegfried DzwonnekGünter Helling (1 patent)Siegfried DzwonnekSiegfried Dzwonnek (2 patents)Jorg HagemannJorg Hagemann (22 patents)Ralf WeimannRalf Weimann (13 patents)Günter HellingGünter Helling (10 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Agfa Gevaert Nv (1 from 1,310 patents)

2. Agfa-gevaert (1 from 666 patents)


2 patents:

1. 6534254 - Color photographic print material

2. 6015654 - Color photographic recording material

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as of
12/27/2025
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