Growing community of inventors

Nürnberg, Germany

Holger Herdegen

Average Co-Inventor Count = 2.00

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 = 3

Holger HerdegenAlex Fraese (1 patent)Holger HerdegenHolger Herdegen (1 patent)Alex FraeseAlex Fraese (5 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Kennametal Inc. (1 from 1,544 patents)


1 patent:

1. 9561549 - Drilling tool

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as of
12/20/2025
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