Growing community of inventors

Leverkusen, Germany

Dirk Grotjohann

Average Co-Inventor Count = 5.33

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 = 36

Dirk Grotjohann ↔ Gerhard Wegener (1 patent)Dirk Grotjohann ↔ Hans-Georg Pirkl (1 patent)Dirk Grotjohann ↔ Stephan Klein (1 patent)Dirk Grotjohann ↔ Christine Mendoza-Frohn (1 patent)Dirk Grotjohann ↔ Joachim Rehse (1 patent)Dirk Grotjohann ↔ Daniel Koch (1 patent)Dirk Grotjohann ↔ Mathias Berwe (1 patent)Dirk Grotjohann ↔ Christian R Thomas (1 patent)Dirk Grotjohann ↔ Rudolf Uchdorf (1 patent)Dirk Grotjohann ↔ Heinz-Herbert Müller (1 patent)Dirk GrotjohannDirk Grotjohann (2 patents)Gerhard WegenerGerhard Wegener (22 patents)Hans-Georg PirklHans-Georg Pirkl (16 patents)Stephan KleinStephan Klein (16 patents)Christine Mendoza-FrohnChristine Mendoza-Frohn (15 patents)Joachim RehseJoachim Rehse (11 patents)Daniel KochDaniel Koch (11 patents)Mathias BerweMathias Berwe (10 patents)Christian R ThomasChristian R Thomas (5 patents)Rudolf UchdorfRudolf Uchdorf (5 patents)Heinz-Herbert MüllerHeinz-Herbert Müller (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Bayer Aktiengesellschaft (1 from 12,157 patents)

2. Bayer Healthcare Aktiengesellschaft (1 from 76 patents)

3. Bayer Schering Pharma Ag (192 patents)


2 patents:

1. 7351823 - Preparation process

2. 6649798 - Method for production of diaminodiphenylmethanes

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as of
12/7/2025
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