Growing community of inventors

Cologne, Germany

Ewald Hartmann

Average Co-Inventor Count = 1.33

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 = 35

Ewald HartmannHendrik De Bliek (1 patent)Ewald HartmannEwald Hartmann (2 patents)Hendrik De BliekHendrik De Bliek (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Clouth Gummiwerke Aktiengesellschaft (2 from 20 patents)

2. Fonderie Et Ateliers De Mersch S.a. (1 from 1 patent)


2 patents:

1. 4349234 - Wear resistant wheel for endless track

2. 4029296 - Diaphragm valve arrangement

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as of
1/16/2026
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