% Expired Patents = 25.0

EPO Patents = 2

Forward Citations = 30

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13 inventors (with patents filed for the assignee):

Bernhard Handschuck (3 out of 4 patents)

Helmut Eilers (2 out of 2 patents)

Thomas Bartsch (1 out of 2 patents)

4. Andrea Neumann (1 out of 1 patent)

5. Ruediger Schulz (1 out of 1 patent)

6. Volkmar Wierzbicki (1 out of 1 patent)

7. Rüdiger Schulz (1 out of 1 patent)

8. Erik Sommer (1 out of 1 patent)

9. Michael Schmidt (1 out of 1 patent)

10. Marko Wohlfahrt (1 out of 1 patent)

11. Jan Richtsteiger (1 out of 1 patent)

12. Falk Schneider (1 out of 1 patent)

13. Christian Andreas Heine (1 out of 2 patents)

4 patents: Sort by Forward Citations

1. 8201441 - Method and device for determining the degree of hardness of semisolid materials (2012-06-19),

2. 8066960 - Method and device for an accelerated oxidation test of fuels or petroleum products, as well as a computer program for controlling such a device, and a corresponding computer readable storage medium (2011-11-29),

3. 7995206 - Apparatus and method for recognizing objects (2011-08-09),

4. 5869343 - Method and apparatus for the automated testing of the flash point (1999-02-09),

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

4 Patents

#1 in Dahlewitz

#7,037 in Germany

Dahlewitz, Germany

Petrotest Instruments Gmbh Co. Kg

Forward Citations = 30

13 inventors:

Bernhard Handschuck (3 out of 4 patents)

Helmut Eilers (2 out of 2 patents)

Thomas Bartsch (1 out of 2 patents)

4. Andrea Neumann (1 out of 1 patent)

5. Ruediger Schulz (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Petrotest Instruments Gmbh Co. Kg. Retrieved from https://idiyas.com/company/petrotest-instruments-company-kg

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

2 patents (EPO):

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]