Growing community of inventors

Erlangen, Germany

Johannes Extra

Average Co-Inventor Count = 1.94

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 = 54

Johannes ExtraHermann Jartyn (3 patents)Johannes ExtraMichael Franke (2 patents)Johannes ExtraMirko Danz (2 patents)Johannes ExtraJohannes Extra (5 patents)Hermann JartynHermann Jartyn (7 patents)Michael FrankeMichael Franke (8 patents)Mirko DanzMirko Danz (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Siemens Aktiengesellschaft (5 from 30,045 patents)


5 patents:

1. 10712724 - Failsafe automation system

2. 8516169 - Method for transmitting telegrams between a control device and a peripheral element via an intermediate device

3. 8245215 - Method for automatically modifying a program and automation system

4. 7418360 - Project design method

5. 7139618 - Method of operation and a control program for a central unit in an automation system

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12/28/2025
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