Growing community of inventors

Marburg, Germany

Roloff Johannsen

Average Co-Inventor Count = 3.43

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 = 40

Roloff JohannsenHans-Harald Sedlacek (2 patents)Roloff JohannsenHermann Erich Karges (1 patent)Roloff JohannsenFriedrich-Robert Seiler (1 patent)Roloff JohannsenFritz Seiler (1 patent)Roloff JohannsenRoloff Johannsen (2 patents)Hans-Harald SedlacekHans-Harald Sedlacek (38 patents)Hermann Erich KargesHermann Erich Karges (10 patents)Friedrich-Robert SeilerFriedrich-Robert Seiler (5 patents)Fritz SeilerFritz Seiler (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Behringwerke Aktiengesellschaft (2 from 340 patents)


2 patents:

1. 4166106 - Immunologic determination method

2. 4157383 - Tanned thrombocytes

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12/7/2025
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