Growing community of inventors

Krefeld, Germany

Holger Friedrich

Average Co-Inventor Count = 2.59

ph-index = 3

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 = 19

Holger FriedrichRainer Ortmann (3 patents)Holger FriedrichMatthias Boll (2 patents)Holger FriedrichUlrich Meisen (1 patent)Holger FriedrichHorst Brunn (1 patent)Holger FriedrichJurgen Kischkewitz (1 patent)Holger FriedrichHerbert Kunstmann (1 patent)Holger FriedrichMatthias Stenger (1 patent)Holger FriedrichJürgen Kischkewitz (1 patent)Holger FriedrichUdo Holtmann (1 patent)Holger FriedrichJuergen Kischkewitz (3 patents)Holger FriedrichGerald Büchner (1 patent)Holger FriedrichFriedrich Raether (1 patent)Holger FriedrichChris Labuschagne (1 patent)Holger FriedrichDawie Van Der Merwe (1 patent)Holger FriedrichBarry Visagie (1 patent)Holger FriedrichKai Bütje (1 patent)Holger FriedrichJens Baber (1 patent)Holger FriedrichKarl-Heinz Van Bonn (1 patent)Holger FriedrichMatthias Boll (0 patent)Holger FriedrichFrank Jorg Clemens (0 patent)Holger FriedrichGerald Dipl-Ing Büchner (0 patent)Holger FriedrichDr Frank Jorg Clemens (0 patent)Holger FriedrichHolger Friedrich (10 patents)Rainer OrtmannRainer Ortmann (3 patents)Matthias BollMatthias Boll (8 patents)Ulrich MeisenUlrich Meisen (23 patents)Horst BrunnHorst Brunn (15 patents)Jurgen KischkewitzJurgen Kischkewitz (12 patents)Herbert KunstmannHerbert Kunstmann (5 patents)Matthias StengerMatthias Stenger (5 patents)Jürgen KischkewitzJürgen Kischkewitz (4 patents)Udo HoltmannUdo Holtmann (3 patents)Juergen KischkewitzJuergen Kischkewitz (3 patents)Gerald BüchnerGerald Büchner (2 patents)Friedrich RaetherFriedrich Raether (2 patents)Chris LabuschagneChris Labuschagne (1 patent)Dawie Van Der MerweDawie Van Der Merwe (1 patent)Barry VisagieBarry Visagie (1 patent)Kai BütjeKai Bütje (1 patent)Jens BaberJens Baber (1 patent)Karl-Heinz Van BonnKarl-Heinz Van Bonn (1 patent)Matthias BollMatthias Boll (0 patent)Frank Jorg ClemensFrank Jorg Clemens (0 patent)Gerald Dipl-Ing BüchnerGerald Dipl-Ing Büchner (0 patent)Dr Frank Jorg ClemensDr Frank Jorg Clemens (0 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Lanxess Deutschland Gmbh (8 from 383 patents)

2. Philip Morris Products S.a. (1 from 1,280 patents)

3. Bayer Chemicals Ag (1 from 14 patents)


10 patents:

1. 10440990 - Composite heat source for a smoking article

2. 9725364 - Method for reducing hexavalent chromium in oxidic solids

3. 9663383 - Process for preparing chromium(III) oxide

4. 9580333 - Process for preparing chromium(III) oxide

5. 8414698 - Pigment/auxiliary combination having improved colour properties

6. 7931745 - Black pigment/auxiliary combination having improved colour strength

7. 7837785 - Process for the preparation of pigment granules and the use thereof

8. 7410536 - Oxidation-stable iron oxide pigments, process for preparing them and their use

9. 7387672 - Oxidation-stable iron oxide pigments, process for preparing them and their use

10. 7144455 - [object Object]

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12/7/2025
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